共查询到20条相似文献,搜索用时 31 毫秒
1.
Show-Jen Chiou Chien-Chu Wang Chih-Ming Chang 《Journal of organometallic chemistry》2008,693(24):3582-3586
HSCH2CONHCH3 and HSCH2CON(CH3)2 containing a peptide bond are prepared for the synthesis of DNICs with/without intra-molecular hydrogen bonding, respectively. The IR ν(NO) bands of [(NO)2Fe(SCH2CONHCH3)2]− (2) appears at 1751, 1700 cm−1. In complex 2, the presence of intramolecular [NH?S] hydrogen bonding was verified by the observation of IR spectroscopy with N−H stretching frequency 3334 cm−1 (CDCl3) and subsequently confirmed by single-crystal X-ray diffraction showing N−S distance of 2.94 Å. Complex 2 displays the rhombic EPR spectrum with g1 = 2.039, g2 = 2.031 and g3 = 2.013 at in frozen H2O. Complexes 2 and 3 rapidly release NO when exposed to light. The time needed for photolysis reactions of 2 is two times faster than that of 3 in less polar solvent. Representative time courses for the photolability of 2 and 3 in THF display the NO-off ability: 2 > 3. 相似文献
2.
Taimur A. Shaikh 《Journal of organometallic chemistry》2006,691(9):1825-1833
The combination of various dithiols and AsX3 (X = F, Cl) produces the series of cyclized halo-arsenic dithiolate compounds: 2-chloro-1,3,2-dithiarsolane [AsCl(SCH2CH2S)] (1), 2-iodo-1,3,2-dithiarsolane [AsI(SCH2CH2S)] (2), 2-chloro-1,3,2-dithiarsenane [AsCl(SCH2CH2CH2S)] (3), 2-iodo-1,3,2-dithiarsenane [AsI(SCH2CH2CH2S)] (4), 3-chloro-4H,7H-5,6-benz-1,3,2-dithiarsepine [AsCl(SCH2)2(C6H4)] (5), 1,2-bis-dithiarsolan-2-ylmercapto-ethane [As2(SCH2CH2S)2(SCH2CH2S)] (6) and tris-(pentafluorophenylthio)-arsen [As(SC6F5)3] (7). The geometry around As for these compounds is best described as trigonal pyramidal with varying degrees of distortion. Compound 1 crystallizes in two polymorphic forms with similar structural parameters. The compounds have been characterized by IR, 1H, 19F, and 13C NMR, X-ray crystallography and GC-MS. 相似文献
3.
Derivatives of difluoroboron curcumin (BF2-curcumin, BF2-cur(OMe)2, BF2-cur(OTs)2, and BF2-curOTs), were synthesized. All compounds possessed electron donor moieties at both ends of the conjugated π system and an electron acceptor moiety in the middle of the molecules (D-A-D system) and should exhibit different optical properties depending on substituents on the benzene rings. Photophysical properties of curcumin and difluoroboron curcumin derivatives were explored. The electron-withdrawing substituent could decrease the electron acceptability of BF2-acceptor moiety resulting in the hypsochromic shift of both absorption and emission bands. BF2-curcumin and BF2-cur(OMe)2 displayed the positive solvatochromic effect relying predominantly on polarity and polarizability of the solvent. Interestingly, BF2-curcumin showed high selectivity and sensitivity towards cyanide with the detection limits of 22 μM and 0.14 μM measured by visual detection and UV-vis spectrophotometry, respectively. Compared to the original curcumin, BF2-curcumin offered a remarkably promising detection of cyanide with 66-fold enhancement in aqueous media (4:1 of CH3CN/H2O). 相似文献
4.
Zilu Chen 《Journal of organometallic chemistry》2007,692(22):4875-4885
Ligand substitution in W(CO)4(NO)(ClAlCl3) with 2-(dimethylphosphino)imidazole (dmpi) bearing an acidic NH functionality afforded W(Cl)(CO)(NO)(bdmpi)(dmpi) (1) (bdmpi = 1,2-bis(dimethyl-phosphino)imidazole), while the reaction of dmpi with W(Cl)(NO)(P(OMe)3)4 led to the isolation of W(Cl)(NO)(dmpi)4 (2) together with W(Cl)(NO)(bdmpi)(dmpi)2 (3). Attempts to replace the chloride by a hydride ligand in 1-3 applying various hydride reagents did not lead to stable products. The soluble compound W(Cl)(NO)(dmpe)(dmpi)2 (5) was prepared by an alternative route from W(Cl)(NO)[P(OMe)3)]4 via the intermediacy of W(Cl)(NO)(P(OMe)3)2(dmpe) (4). The protection of the NH function in 5 was approached applying BuLi and subsequently Me3SiCl to afford [W(Cl)(NO)(dmpe)(tmsdmpi)2] (tmsdmpi = 1-trimethylsilyl-2-dimethylphosphino-imidazole) (6) which could not be isolated in pure form. The reaction of 5 with NaHBEt3 led to the formation of a deprotonated and nitrogen-coordinated salt Na[W(NO)(dmpe)(dmpi)(tebdmpi)] (7) (tebdmpi = 2-dimethylphosphino-3-triethylboro-imidazole). Compound 7 crystallized from CH3CN to establish a one-dimensional chain structure in the solid state. The structures of compounds 1-5 and 7 were studied by single-crystal X-ray diffraction. 相似文献
5.
Ronald Lindner Goran N. Kaluđerović Reinhard Paschke Christoph Wagner Dirk Steinborn 《Polyhedron》2008
Reactions of [PtMe3(OCMe2)3](BF4) and [(PtMe3I)4] with pyrazole (pzH) afforded mononuclear pyrazole platinum(IV) complexes [PtMe3(pzH)3](BF4) (1) and [PtMe3I(pzH)2] (2), respectively. The formation of dinuclear pyrazolato bridged platinum(IV) complexes (PPN)[(PtMe3)2(μ-pz)3] (3), (PPN)[(PtMe3)2(μ-I)(μ-pz)2] · 1/2Et2O (4) and [K(18C6)][(PtMe3)2(μ-I)(μ-pz)2] (5) was achieved by the reaction of each 1 and 2 with [PtMe3(OCMe2)3](BF4) in the presence of KOAc followed by reaction with (PPN)Cl (PPN+ = bis(triphenylphosphine)iminium cation) and 18C6, respectively. The reaction of complex 4 with AgO2CCF3 followed by addition of RSR′ (R/R′ = Me/Me, Me/Ph) resulted in the formation of complexes [(PtMe3)2(μ-pz)2(μ-RSR′)] (R/R′ = Me/Me, 6; Me/Ph, 7). All complexes were characterized unambiguously by microanalysis and NMR (1H, 13C) spectroscopic investigations. Additionally, crystal structures of complexes 3 and 4 as well as DFT calculation are presented. Furthermore, in vitro studies on the anti-proliferative activity of complexes 2 and 5 were carried out. 相似文献
6.
Takayuki Nakajima Hiromi Konomoto Yasuo Wakatsuki 《Journal of organometallic chemistry》2007,692(22):4886-4894
The SO2 substitution for a CO ligand of the hexa-nuclear carbonyl complexes having Ru5M(C) type carbido-metal core, [PPN][Ru5Co(C)(CO)16] (2), [PPN][Ru5Rh(C)(CO)16] (3), and Ru5Pd(C)(CO)16 (4), is dramatically affected by the kind of metal atom M: 2 (M = Co) is reactive but not site-selective, 3 (M = Rh) is reactive and site-selective, whereas 4 (M = Pd) is not reactive at all even though 4 can easily react with PPh3 to give the substitution products. 相似文献
7.
Marcin Konkol Tetsuya Kohno Tatsuya Miyatake 《Journal of organometallic chemistry》2011,696(9):1792-2956
The tetradentate [OSSO]-type bis(phenol) ligands, [{2,2′-(HOC6H2-4,6-R2)2CH2SCH2CH2SCH2}] (R = tBu, 2; Br, 3) react with MBz4 (M = Zr, Hf) to yield the corresponding dibenzyl complexes, [M{2,2′-(OC6H2-4,6-R2)2CH2SCH2CH2SCH2}Bz2] (R = Br, M = Zr, 4Br; Hf, 5Br; R = tBu, M = Hf, 5) in a good to very good yield. Zirconium diamido complexes, [Zr{2,2′-(OC6H2-4,6-R2)2CH2SCH2CH2SCH2}(NMe2)2] (R = tBu, 6; Br, 6Br) were prepared in a reaction of the corresponding disodium salt of 2 or 3 generated in situ with ZrCl2(NMe2)2(THF)2. Heating of 6 with TMSCl at 35 °C afforded zirconium dichloro complex, [Zr{2,2′-(OC6H2-4,6-tBu2)2CH2SCH2CH2SCH2}Cl2] (7), whereas the titanium analog 8 was prepared in a direct reaction with TiCl4. While for complexes 4Br, 5, 5Br, 6, 6Br and 7 single C2-symmetric isomers were observed in solution at room temperature, as revealed by the NMR spectroscopic data, titanium complex 8 formed as a mixture of cis-α (8a) and cis-β (8b) isomers in a ratio of approx. 20:80% (measured in CD2Cl2). The VT NMR studies revealed a reversible conversion of 8a into 8b above 60 °C. The X-ray crystal structure determination of complexes 4Br, 5Br and 7 confirmed their C2-symmetrical configuration in the solid state with cis-arranged benzyl/chloro groups and the trans-coordination of two bulky phenolato moieties. The zirconium dibenzyl complexes exhibit good catalytic activities in homopolymerization of 1-hexene (atactic poly(1-hexene), PDI = 1.5-1.7) and vinylcyclohexane (isotactic poly(vinylcyclohexane), PDI = 1.2-1.8) upon activation with a co-catalyst. In both polymerizations no increase of activity was observed for the complex 4Br with electron-withdrawing substituents on phenolate rings. Moreover, polymerization of liquid propylene catalyzed by the titanium dichloro isomeric mixture 8 afforded at 5 °C ultrahigh molecular weight atactic/isotactic polypropylene mixtures. 相似文献
8.
Verónica García-Montalvo María Granados-OrtízAlfredo A. Guevara-García Viviana LomelíSandra González-Gallardo Diego Ocampo-Gutiérrez de VelascoRaymundo Cea-Olivares Simón Hernández-OrtegaRubén Alfredo Toscano 《Polyhedron》2011,30(6):1095-1102
[D(CH2CH2S)2]M(XCH2CH2Y) 1-8 (M = Ge, Sn; D = O, S; X = Y = S, O and X = S, Y = O) spirocycles were synthesized to analyze the influence of the metal center replacement and the donor atom hardness on the strength of the transannular bond and the hypercoordination phenomena. The compounds were characterized by IR, Raman and NMR (1H, 13C and 119Sn) spectroscopy, E.I. mass spectrometry and elemental analysis. The molecular and crystal structures of compounds 3, 4, 6-8 and Ge(SCH2CH2S)2 (9) were obtained by X-ray diffraction analyses. They all exhibit five-coordinate central atoms due to transannular metal coordination (M?D) except 4, which displays a dimeric structure formed by the fusion of two five-membered rings resulting in a cyclic-distannoxane unit, {[O(CH2CH2S)2]Sn(SCH2CH2O)}2. The relationship between the nature of the metal center and the differences found between the two germanium and tin series are discussed. 相似文献
9.
Hui-Jun Xu Jia-Feng Sun Yi-Zhi Li Zi-Ling Xue 《Journal of organometallic chemistry》2008,693(26):3851-3857
Ruthenium(II) nitrosyl complexes with polypyrazolylmethanes, [(Bpm)Ru(NO)Cl3] [Bpm = bis(1-pyrazolyl)methane, 1], [(Bpm∗)Ru(NO)Cl3] [Bpm∗ = bis(3,5-dimethyl-1-pyrazolyl)methane, 2], [(Tpm)Ru(NO)Cl2][PF6] [Tpm = tris(1-pyrazolyl)methane, 3], and [(Tpm∗)Ru(NO)Cl2][PF6] [Tpm∗ = tris(3,5-dimethyl-1-pyrazolyl)methane, 4], have been synthesized and characterized. The solid-state structures of [(Bpm∗)Ru(NO)Cl3] (2) and [(Tpm∗)Ru(NO)Cl2][PF6] (4) were determined by single-crystal X-ray crystallographic analyses. These complexes have been tested as catalysts in the transfer hydrogenation of several ketones under mild conditions. 相似文献
10.
Four adducts were formed by the reaction of trans-Mo(dmpe)2(H)(NO) (1) (dmpe = bis(dimethylphosphino)ethane) and a respective lithium reagent to afford, [Mo(dmpe)2(H)(NO)LiHBEt3]2 (2), [Mo(dmpe)2(H)(NO)LiN(SiMe3)2]2 (3), [Mo(dmpe)2(H)(NO)]3(LiBH4)2 (4), and {[Mo(dmpe)2(H)(NO)]2[LiBH4]5}n (5). Structures 2-5 were characterized by crystal X-ray diffraction analyses. Structures 2 and 3 revealed to be dimers of the 1:1 adduct of 1 and the lithium salt. The two nitrosyl oxygen atoms in 2 are μ2-bridged connecting two separate LiHB(C2H5)3 moieties, whereas in 3 these oxygen atoms exhibit a terminal coordination mode binding to two lithium ions of the dimeric [LiN(SiMe3)2]2 unit. Structure 4 shows a discrete structure formed by two separate mononuclear LiBH4 units being bridged by the nitrosyl oxygen atoms of three Mo(dmpe)2(H)(NO) moieties. Structure 5 displays a complicated chain structure with differently coordinated lithium centers, various types of bridging BH4 and bridging nitrosyl groups. 相似文献
11.
Xian Tao 《Journal of organometallic chemistry》2011,696(13):2681-2666
The preparation of {[(MeO)3P]n·AgO3SCH3} (n = 1, 2a; n = 2, 2b) is described. The molecular structure of 2a was determined by using X-ray single crystal analysis. Complex 2a contains an Ag4 rectangular make-up, the centroid of which constitutes an inversion center. Complex 2b was used as precursor in the deposition of silver films using metal organic chemical vapor deposition (MOCVD) technique for the first time. The silver films obtained were characterized using scanning electron microscopy (SEM) and energy-dispersion X-ray (EDX) analysis. 相似文献
12.
Interaction of [Ru(NO)Cl3(PPh3)2] with K[N(R2PS)2] in refluxing N,N-dimethylformamide afforded trans-[Ru(NO)Cl{N(R2PS)2}2] (R = Ph (1), Pri (2)). Reaction of [Ru(NO)Cl3(PPh3)2] with K[N(Ph2PSe)2] led to formation of a mixture of trans-[Ru(NO)Cl{N(Ph2PSe)2}2] (3) and trans-[Ru(NO)Cl{N(Ph2PSe)2}{Ph2P(Se)NPPh2}] (4). Reaction of Ru(NO)Cl3 · xH2O with K[N(Ph2PO)2] afforded cis-[Ru(NO)(Cl){N(Ph2PO)2}2] (5). Treatment of [Rh(NO)Cl2(PPh3)2] with K[N(R2PQ)2] gave Rh(NO){N(R2PQ)2}2] (R = Ph, Q = S (6) or Se (7); R = Pri, Q = S (8) or Se (9)). Protonation of 8 with HBF4 led to formation of trans-[Rh(NO)Cl{HN(Pri2PS)2}2][BF4]2 (10). X-ray diffraction studies revealed that the nitrosyl ligands in 2 and 4 are linear, whereas that in 9 is bent with the Rh–N–O bond angle of 125.7(3)°. 相似文献
13.
The yttrium chloride with the bridged bis(amidinate) L (L = Me3SiNC(Ph)N(CH2)3NC(Ph)NSiMe3) LYCl(DME) (2) was synthesized and structurally characterized. Treatment of LLnCl(sol)x (Ln = Yb, sol = THF, x = 2 1; Ln = Y, sol = DME, x = 1 2) with the dilithium salt Li2L(THF)0.5 afforded the novel bimetallic lanthanide complexes supported by three ligands, Ln2(μ2-L)3 · DME (Ln = Yb 3, Y 4; DME = dimethylether), instead of the designed complex LLn(μ2-L)LnL via the ligand redistribution reaction. Complexes 3 and 4 were fully characterized including X-ray analysis and 1H NMR spectrum for 4. Reaction of LnCl3 (Ln = Yb, Y) with 2 equiv. of Li2L(THF)0.5 gave the anionic complexes [Li(DME)3][L2Ln] (Ln = Yb 5, Y 6), which were confirmed by a crystal structure determination. The further study indicated that complexes 3 and 4 can also be synthesized by reaction of LnCl3 (Ln = Yb, Y) with 1.5 equiv. of Li2L(THF)0.5 or reaction of 1 and 2 with anionic complexes 5 and 6. Complexes 3, 4, 5 and 6 were found to be high active catalysts for ring-opening polymerization of ε-caprolactone (CL). 相似文献
14.
Li-Ming Tang 《Journal of organometallic chemistry》2006,691(9):2023-2030
A series of new titanium complexes bearing β-diiminato ligands [(Ph)NC(R1)CHC(R2)N(Ph)]2TiCl2 (4a: R1 = R2 = CH3; 4b: R1 = R2 = CF3; 4c: R1 = Ph, R2 = CH3; 4d: R1 = Ph, R2 = CF3) has been synthesized and characterized. X-ray crystal structures reveal that complexes 4a and 4c adopt distorted octahedral geometry around the titanium center. With modified methylaluminoxane (MMAO) as a cocatalyst, complexes 4a-d are active catalysts for ethylene polymerization, and produce high molecular weight polyethylenes. Catalyst activities and the molecular weights of polymers are considerably influenced by the steric and electronic effects of substituents on the catalyst backbone under the same polymerization condition. With the strong electron-withdrawing groups (CF3) at R1 or/and R2 position, complexes 4b and 4d show higher activities than complexes 4a and 4c, respectively. 相似文献
15.
Sodio C.N. Hsu Howard H.Z. Chen I-Jung Lin Jung-Jung Liu Po-Yu Chen 《Journal of organometallic chemistry》2007,692(17):3676-3684
The reaction of [Cu(NCMe)4](BF4) with equimolar amounts of the tris(substituted-pyrazolyl)methane ligand HCPz3 or HC(3,5-Me2Pz)3 yields the respective salts [Cu(HCPz3)(NCMe)](BF4) (1a) or [Cu(HC(3,5-Me2Pz)3)(NCMe)](BF4) (1). The acetonitrile ligand of 1 can be replaced by prazine, 4,4′-dipyridine or 1,4-diisocyanobenzene to yield related mononuclear complexes [Cu(HC(3,5-Me2Pz)3)(pyrazine)](BF4) (2), [Cu(HC(3,5-Me2Pz)3)(4,4′-bipyridine)] (BF4) (3) or [Cu(HC(3,5-Me2Pz)3)(1,4- CNC6H4NC)](BF4) (7), respectively. A series of binuclear copper(I) complexes {[Cu(HC(3,5-Me2Pz)3)]2(μ -BL)}(BF4)2 (4, BL = pyrazine; 5, BL = 4,4′-dipyridine; 8, BL = 1,4-diisocyanobenzene) were prepared by treating equal molar ratio of 1 with related mononuclear complexes 2, 3 and 7. In addition, binuclear copper(I) complexes were also prepared from treatment of 2 equiv of 1 with the related bridge ligand. Both of 4 and 5 reformed mononuclear starting complex 1 in acetonitrile solution. However, the more robust complex 8 was stable in acetonitrile solutions. The structure of complexes 1a, 4, 5, and 7 were confirmed by X-ray crystallography. The redox properties of 4 and 8 were examined by cyclic voltammetry and exhibited two quasi-reversible waves suggesting that no significant structural reorganization occurs during the redox process on the electrochemical time scale. 相似文献
16.
Ashok K.S. Chauhan Puspendra Singh Ray J. Butcher 《Journal of organometallic chemistry》2010,695(18):2118-3656
Elemental tellurium inserts into the Csp3-Br bond of α-bromomesitylmethyl ketone and due to its strong carbophilic character affords the crystalline C-tellurated derivative of 2,4,6-trimethylacetophenone, (MesCOCH2)2TeBr2, 1b in over 80% yield. Electrophilic substitution of the parent ketone with aryltellurium trichlorides, at room temperature, gives nearly quantitative yields of unsymmetrical alkylaryltellurium dichlorides (MesCOCH2)ArTeCl2 (Ar = mesityl, Mes, 2a; 1-naphthyl, Np, 3a; anisyl, Ans, 4a). Fairly stable mesitoylmethyltellurium(II) derivatives, (MesCOCH2)2Te, 1 and (MesCOCH2)ArTe (Ar = Mes, 2; Np, 3 and Ans, 4) obtained as the reduction products of their dihalotellurium(IV) analogues, readily undergo oxidative addition of dihalogens to afford the corresponding (MesCOCH2)2TeX2 (X = Cl, 1a; Br 1b; I, 1c) and (MesCOCH2)ArTeX2 (X = Cl, Br, I, Ar = Mes, 2a, 2b, 2c; Np, 3a, 3b, 3c and Ans, 4a, 4b, 4c). Crystallographic structural characterization of 1, 1b, 2, 2a, 2b, 2c, 3, 3a and 4c illustrates that the steric demand of mesityl group appreciably influences primary geometry around the 5-coordinate Te(IV) atom when it is bound directly to it. It also makes the Te atom inaccessible for the ubiquitous Te?X intermolecular secondary bonding interactions that result in supramolecular structures. In the crystal lattice of symmetrical telluroether 1, an interesting supramolecular synthon based upon reciprocatory weak C-H?O H-bonding interaction gives rise to chains via self-assembly. 相似文献
17.
Meisu Zhou 《Journal of organometallic chemistry》2007,692(23):5195-5202
Equivalent addition reactions of PhN(Li)SiMe3 to nitriles, RCN (R = dimethylamido, 1-piperidino), generated non-symmetric guanidinato lithium [(Et2O)LiN(SiMe3)C(NMe2)N(Ph)]2 (1) or [(THF)LiN(SiMe3)C(NMe2)N(Ph)]2 (2) and [(Et2O)LiN(SiMe3)C(N(CH2)5)N(Ph)]2 (5) which further reacted with zirconium or hafnium tetrachloride to form Zr and Hf guanidinato complexes with the general formula [PhNC(R)NSiMe3]3MCl (R = dimethylamido, M = Zr (3), Hf (4); R = 1-piperidino, M = Zr (6), Hf (7)). Complexes 1-4, 6 and 7 were well characterized by 1H, 13C NMR and microanalysis, the single crystal X-ray diffraction analysis data for complexes 1, 3, 4 and 7 were also provided. Furthermore, complexes 3, 4, 6 and 7 were found to be active for ethylene polymerization. The influences of cocatalyst, pressure, reaction temperature and Al/M ratio on activity were investigated. 相似文献
18.
Rute F. Vitor 《Journal of organometallic chemistry》2004,689(25):4764-4774
The novel pyrazolyl containing ligands 4-(HOOC)pz(CH2)2NH(CH2)2NH2 (L1) and 4-(HOOCCH2)-3,5-Me2pz(CH2)2NH(CH2)2NH2 (L2), and 3,5-Me2pz(CH2)2S(CH2)2SCH2CH3 (L3), 3,5-Me2pz(CH2)2S(CH2)2SCH2COOEt (L4) and 3,5-Me2pz(CH2)2S(CH2)2SCH2COOH (L5) were synthesized, and their ability to stabilise complexes with the fac-[M(CO)3]+ (M = Re,99mTc) moiety was evaluated. Reactions of L1-L5 with the Re(I) tricarbonyl starting materials (NEt4)2[Re(CO)3Br3] and/or [Re(CO)5Br] afforded complexes fac-[Re(CO)3(κ3-L)] (L = L1-L5 (1-5)), which contain the pyrazolyl ancillary ligands coordinated in a tridentate fashion. Complexes 1-5 were characterized by the common analytical techniques, which included single crystal X-ray diffraction analysis in the case of 4. The structural analysis of 4 confirmed the tridentate coordination mode of the pyrazole-dithioether ligand, which is facially coordinated to the Re(I) centre through the nitrogen from the pyrazole ring and the two thioether sulphur atoms, without involvement of the terminal ester functional group. The distorted octahedral coordination environment around the metal is completed by the three facial carbonyl ligands. The radioactive congeners of complexes 1, 3 and 4, fac-[99mTc(CO)3(κ3-L)]+ (L = L1 (1a), L3 (3a), L4 (4a)), have been prepared by reacting the precursor fac-[99mTc(CO)3(H2O)3]+ with the corresponding ligands, and their identity confirmed by HPLC comparison with the rhenium surrogates. Complexes 1a and 3a have been challenged in the presence of a large excess of histidine or cysteine, in order to evaluate their in vitro stability. Only a negligible displacement was observed, indicating that pyrazole-diamine and pyrazole-dithioether chelators provide a high kinetic inertness and/or stability to organometallic complexes with the fac-[99mTc(CO)3]+ moiety. 相似文献
19.
Mitsushiro Nomura Souichi Sakaki Yoshimasa Hoshino 《Journal of organometallic chemistry》2006,691(15):3274-3284
The one-pot reaction of [Cp∗Mo(NO)(CO)2] with elemental sulfur and dimethyl acetylenedicarboxylate (C2Z2 (Z = COOMe)) gave the [2+2] cycloadduct of the mononuclear molybdenum dithiolene complex [Cp∗Mo(NO)(S2C2Z2)(C2Z2)] (1), and some binuclear complexes:[Cp∗Mo(NO)(S2C2Z2)]2 (2), [Cp∗2Mo2(NO)2S2(S2C2Z2)] (3) and [Cp∗Mo(NO)S2]2 (4).The reaction of [Cp∗Mo(NO)(Cl)(μ-Cl)]2 with OC{S2C2(COOMe)2} in the presence of sodium methoxide also produced complex 2 and the paramagnetic Cp∗Mo bisdithiolene complex [Cp∗Mo(S2C2Z2)2] (5, Z = COOMe).The structures of complexes 1-5 were determined by X-ray crystal structure analysis.The nitrosyl ligands of complexes 1-4 showed a linear coordination to the molybdenum center (the Mo-N-O bond angles = 169-174°), and their N-O bond lengths were 1.17-1.20 Å.In the binuclear complexes 2-4, two nitrosyl ligands were placed at cis-position.Complexes 1 and 2 were characterized by cyclic voltammetry and spectroelectrochemistry (visible and IR). The electrochemical reduction of the dimeric complex 2 formed the monomeric dithiolene complex[Cp∗Mo(NO)(S2C2Z2)]− (X−) whose lifetime was several minutes. When the anion X− was electrochemically oxidized, the coordinatively unsaturated species X was generated, but it was immediately dimerized to afford the original dimeric complex 2. The reduction of the complex 1 included the elimination of the bridged DMAD moiety (C2Z2) to give the anion X−. 相似文献
20.
Olesia V. Moroz Victor A. Trush Irina S. Konovalova Oleg V. Shishkin Yurii S. Moroz Serhiy Demeshko Vladimir M. Amirkhanov 《Polyhedron》2009
The reaction of sodium dimethyl(phenylsulfonyl)amidophosphate NaL (HL = C6H5SO2NHP(O)(OCH3)2) with Cu(NO3)2 · 6H2O and o-bpe (1,2-bis(pyridine-2-yl)ethane) in appropriate ratios, afford the formation of 1D coordination polymer [Cu(L)2 · o-bpe]n in good yield. The crystal structures of HL (1) and [Cu(L)2 · o-bpe]n (2) are reported. In the crystal package the molecules of 1 are linked by intermolecular hydrogen bonds formed by the phosphoryl oxygen atoms which serve as acceptors and nitrogen atoms of amide groups as donors. The crystal structure of 2 indicates the presence of unsaturated Cu(L)2 unit bridged by o-bpe ligand in the one-dimensional polymeric chain. The Cu(II) atoms have distorted 4 + 2 octahedral CuO4N2 environment formed by the oxygen atoms belonging to the sulfonyl and phosphoryl groups of two deprotonated chelate ligands and nitrogen atoms of the bridging o-bpe ligands. 相似文献