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1.
Treatment of the uranium(IV) complexes [{ML1(py)}2UIV] (M = Cu, Zn; L1 = N,N′-bis(3-hydroxysalicylidene)-1,3-propanediamine) with silver nitrate in pyridine led to the formation of the corresponding cationic uranium(V) species which were found to be thermally unstable and were converted back into the parent UIV complexes; no electron transfer was observed in solution between the UIV and UV compounds. In the crystals of [{ML1(py)}2UIV][{ML1(py)}2UV][NO3], the neutral UIV and cationic UV species are clearly identified by the distinct U–O distances. Similar reaction of [{ZnL2(py)}2UIV] [L2 = N,N′-bis(3-hydroxysalicylidene)-1,4-butanediamine] with AgNO3 gave crystals of [{ZnL2(py)}UV{ZnL2(py)2}][NO3] but the copper counterpart was not isolated. Crystals of [{ZnL1(py)}2UV][OTf] · THF (OTf = OSO2CF3) were obtained fortuitously from the reaction of [Zn(H2L1)] and U(OTf)3. 相似文献
2.
Treatment of UO2X2 (X = OAc, Cl, NO3) with 1 mol equiv of (py)2CO in THF afforded the adducts [UO2X2{(py)2CO}] in almost quantitative yields. The same reactions in MeOH, in the presence of NEt3 for X = Cl and NO3, gave yellow crystals of [(UO2X)2{μ-(py)2C(OMe)O}2]·MeOH (X = OAc, 1·MeOH and X = Cl, 2·MeOH) and [{UO2(NO3)}2{μ-(py)2C(OMe)O}2] (3). Reactions of UO2X2 (X = OAc, Cl) with 2 mol equiv of (py)2CO and NEt3 in MeOH or further treatment of 1 and 2 with 1 mol equiv of (py)2CO and NEt3 afforded the methoxide derivative [{UO2(OMe)}2{μ-(py)2C(OMe)O}2] (4), while UO2(NO3)2 was transformed into [{UO2(NO3)}{UO2(OH)}{μ-(py)2C(OMe)O}2] (5). In these first structurally characterized actinide compounds with a (py)2CO-based ligand, the uranium atoms are located at the center of pentagonal (X = Cl and OMe) or hexagonal (X = OAc and NO3) bipyramids sharing one edge defined by the μ-alkoxo oxygen atoms. Crystals of [{UO2(OMe)}2{μ-(py)2C(OMe)O}2]·[(UO2)4{μ2-(py)2C(OMe)O}2(μ2-OAc)2(μ3-O)2(MeOH)2]·H2O (6·H2O) were serendipitously obtained in one experiment with [UO2(OAc)2(H2O)2] and (py)2CO. 相似文献
3.
《Journal of organometallic chemistry》1995,503(2):C46-C47
The reaction of [Fe(CO)2(PPh3)2{η2-SCNC(O)Ph}] with [Co(η-C5H5)(PPh3)2] in benzene solution at room temperature results in the facile cleavage of the CS bond of the SCNC(O)Ph ligand to give [{Co(η-C5H5)}2{Fe(CO)2(PPh3)}(μ3-S{μ3-CNC(O)Ph}], whereas [Fe(CO)2(PPh3)2(η2-SCNMe)] gives [{Co(η-C5H5)} 22{Fe(CO)(CNMe)(PPh3)(μ3-S)(μ3-CO)]. The structure of [{Co(η-C5H5)}2{Fe(CO)2(PPh3)} (μ3-CNC(O)Ph}] has been confirmed by X-ray diffraction. 相似文献
4.
《Polyhedron》2005,24(16-17):2165-2172
Five new hydrogen-bonded solvated iron(II) complexes of pyrazolyl- and imidazolyl-based N,N-chelating ligands have been synthesised. Water to ligand-NH hydrogen-bonded bridges occur in the pseudo-dimeric complexes {cis-[Fe(pypzH)2(NCX)2]2(μ-OH2)(H2O)2} · H2O · MeOH (where X = S or Se), and in the chain complex {cis-[Fe(pypzH)2(NCS)2](μ-OH2)}n. A “half” spin-crossover (Tc = 125 K) was observed in the dimeric X = Se complex by means of magnetic measurements and no thermal hysteresis occurred between 4 and 300 K. The crystal structure at 123 K showed Fe–N distances consistent with the magnetism. Each Fe in the dimeric unit was structurally equivalent in the HS–LS state. Removal of the solvate molecules led to HS–HS behaviour over the temperature range 4–300 K. The pseudo-dimer with X = S also showed HS–HS behaviour as did the monomeric analogue cis-[Fe(pypzH)2(NCS)2]H2O and a structurally different methanol-bridged dimer {cis-[Fe(pyimH)2(NCS)2]2(μ-MeOH)2} · 2MeOH (pypzH = 2-(1H-pyrazol-3-yl)-pyridine; pyimH = 2-(1H-imidazol-2-yl)-pyridine). 相似文献
5.
Oleg V. Gusev Tat’yana A. Peganova Nikolai V. Vologdin Konstantin A. Lyssenko Irina P. Beletskaya 《Journal of organometallic chemistry》2005,690(7):1710-1717
The monoxides [Fe(η5-C5Me4PPh2)(η5-C5Me4P{O}Ph2)] (1) and [Os(η5-C5H4PPh2)(η5-C5H4P{O}Ph2)] (2) have been prepared by treatment of the corresponding diphosphines with CCl4 and methanol.These ligands react with [Pd(PhCN)2Cl2] to give dichloride complexes of different structure.The dimeric complex [{Os(η5-C5H4PPh2)(η5-C5H4P{O}Ph2)}PdCl(μ-Cl)]2 (4) contains the monodentate P-coordinated osmocene ligand with the free P{O}Ph2 group, while the octamethylferrocene ligand gives the chelate k2-P,O complex [{Fe(η5-C5Me4PPh2)(η5-C5Me4P{O}Ph2)}PdCl2] (3).The structures of 3 and 4 have been determined crystallographically.Treatment of 3 and 4 with silver salts in CH2Cl2 or acetonitrile leads to the corresponding dicationic complexes[{M(η5-C5R4PPh2)(η5-C5R4P{O}Ph2)}Pd(MeCN)x]2+ (5, M = Fe, R = Me; 6, M = Os, R = H). Complex 5 decomposes upon isolation, in contrast 6 is rather stable, probably due to Os-Pd bonding. The dichlorides 3 and 4 catalyze catalytic amination of p-bromotoluene with N-(4-tolyl)morpholine with lower activity than (dppf)PdCl2, however they perform comparable to (dppf)PdCl2 activity in coupling of p-bromotoluene with p-methoxyphenyl boronic acid. 相似文献
6.
Akira SugaharaKimio Moriya Masaya EnomotoAtsushi Okazawa Norimichi Kojima 《Polyhedron》2011,30(18):3127-3130
Toward the realization of a ligand-driven light-induced spin change (LD-LISC) around room temperature, we have investigated the spin-crossover phenomenon in [Fe(stpy)4(X)2] (stpy = styrylpyridine, X = NCS, NCBH3) under high pressure. The spin transition temperature increases from 110 to 220 K with increasing applied pressure up to 0.75 GPa for [Fe(trans-stpy)4(NCS)2], while [Fe(cis-stpy)4(NCS)2] shows the high-spin state in the temperature region between 2 and 300 K even at 0.75 GPa. In the case of X = NCBH3, due to the stronger ligand field of NCBH3, the spin transition temperature increases from 240 to 360 K with increasing applied pressure up to 0.50 GPa for [Fe(trans-stpy)4(NCBH3)2]. In the case of [Fe(cis-stpy)4(NCBH3)2], the spin state is the high-spin state in the temperature region between 2 and 300 K. However, the spin transition appears at 125 K under 0.5 GPa and the transition temperature increases with increasing applied pressure. In this way, we have decided the applied pressure region of 0.65-1.09 GPa where [Fe(stpy)4(NCBH3)2] undergoes LD-LISC at room temperature. 相似文献
7.
M. Angeles Alvarez 《Journal of organometallic chemistry》2010,695(1):36-2066
The 30-electron binuclear anion [Mo2Cp2(μ-PCy2)(μ-CO)2]− reacts with the chlorophosphite ClP(OEt)2 or the organotin chlorides Cl2SnPh2 or ClSnPh3 to give compounds of the formula trans-[Mo2Cp2(μ-E)(μ-PCy2)(CO)2], (E = P(OEt)2, SnPh3, SnPh2Cl). In contrast, this anion reacts with the organosilicon chlorides ClSiR3 (R = Ph, Me) to give unstable silyloxycarbyne-bridged complexes [Mo2Cp2(μ-PCy2)(μ-COSiR3)(μ-CO)], which rapidly hydrolyze to give the known hydride [Mo2Cp2(μ-H)(μ-PCy2)(CO)2]. Two main types of products were also observed in the reactions of the title anion with different chlorocomplexes of the transition and post-transition metals. Thus, the reactions with [MCl2Cp2] (M = Ti, Zr) give moisture-sensitive isocarbonyl-bridged complexes of the type [Mo2Cp2(μ-COMClCp2)(μ-PCy2)(μ-CO)]. In contrast, softer metallic electrophiles such as [AuCl(PR3)] (R = iPr, ptol) react with the anion at the dimolybdenum site to form new trimetallic clusters of the formula [AuMo2Cp2(μ-PCy2)(CO)2(PR3)], also retaining a Mo−Mo triple bond. Subsequent reactions of the latter products with the solvate complexes [Au(PR3)(THF)][PF6] give the tetranuclear clusters [Au2Mo2Cp2(μ-PCy2)(CO)2(PR3)2][PF6] (Mo−Mo = 2.5674(3) Å and Au−Au = 2.7832(2) Å when R = iPr). Finally, the reaction of the title anion with HgI2 gives the pentanuclear cluster [Hg{Mo2Cp2(μ-PCy2)(CO)2}2] or the trinuclear cluster [Mo2Cp2(μ-HgI)(μ-PCy2)(CO)2] depending on the stoichiometry being actually used for the reaction. The trinuclear species is only stable in tetrahydrofuran (THF), and decomposes to give a mixture of the dimeric species [Mo2Cp2(μ-HgI)(μ-PCy2)(CO)2]2 along with variable amounts of the known iodide-bridged complex [Mo2Cp2(μ-I)(μ-PCy2)(CO)2]. 相似文献
8.
Vitalina M. Nikitina Oksana V. Nesterova Vladimir N. Kokozay Evgeny A. Goreshnik Julia Jezierska 《Polyhedron》2008
A novel supramolecular assembly [{Cu(enac)}2Cr(NCS)4(NH3)2][Cr(NCS)4(NH3)2]3 · 4(CH3)2CO (enac = 4,6,6-trimethyl-3,7-diazanon-3-ene-1,9-diamine), the first example of a Cu/Cr heterometallic compound containing a Schiff-base ligand such as enac, and an anion of Reineckes salt, Cr(NCS)4(NH3)2−, as a building block, was obtained by the self-assembly reaction of copper powder and Reineckes salt in an acetone/methanol (1:4) solution of ethylenediamine in the open air. An X-ray study shows that the complex includes a trinuclear Cu2Cr cation, constructed from two Cu(enac)2+ moieties and a trans-[Cr(NCS)4(NH3)2]− block as a two-linking bridging ligand. The metal–metal separations within the cation are Cu?Cr = 6.393(31) Å and Cu?Cu = 12.786(63) Å. The supramolecular architecture of the complex involves two types of H-bonded chains, the first chain is generated by trinuclear cations [{Cu(enac)}2Cr(NCS)4(NH3)2]2+, [Cr(NCS)4(NH3)2]− anions and (CH3)2CO molecules, while the second by crystallographically different anions of Reineckes salt and (CH3)2CO. Variable-temperature (1.8–300 K) magnetic susceptibilities show a slight change of the μB value at low temperature, indicative of weak antiferromagnetic interactions (JCuCr = −0.9 cm−1) between the paramagnetic centers. 相似文献
9.
The reactions of Co(O2CCH3)2·4H2O with the sodium salt of p-toluene sulfonic acid (NapTS) and pyridine (py) or 4-methylpyridine (4mepy) in the presence of hydrogen peroxide in methanol led to the formation of [Co(py)3(H2O)3](pTS)2 or [Co(4mepy)2(H2O)4](pTS)2·MeOH, respectively. The coordination polymer [{Co(44′bpy)(H2O)4}(pTS)2]n (4,4′-bipyridine = 44′bpy) was obtained from the reaction of Co(O2CCH3)2·4H2O with 44′bpy in the presence of NapTS. The reaction of Co(O2CCH3)2·4H2O, 2,2′-bipyridine (22′bpy) and NapTS with hydrogen peroxide resulted in the formation of the dinuclear complex [Co2(μ-OH)2(μ-O2CCH3)(O2CCH3)2(22′bpy)2](pTS). Characterization of these complexes and the role of hydrogen peroxide in these reactions are discussed. Similar reactions with sodium sulfamate gave the mononuclear [Co(22′bpy)2(O2CCH3)]NH2SO3·2H2O complex and [Co2(μ-OH)2(μ-O2CCH3)(O2CCH3)2(22′bpy)2](NH2SO3). 相似文献
10.
《Polyhedron》2007,26(9-11):1764-1772
Variable temperature magnetic susceptibility, Mössbauer spectroscopic and X-ray crystallographic studies are described on two structurally similar families of dinuclear iron(II) spin crossover (SCO) complexes of formula [Fe(NCX)(py)]2(μ-L)2, where L is either a 3,5-bis(2-pyridyl)-pyrazolate bridging ligand, bpypz−, examples of which have been earlier reported by Kaizaki and coworkers, or a corresponding 3,5-bis(2-pyridyl)-1,2,4-triazolate, bpytz−. Compounds synthesised were [Fe(NCS)(py)]2(μ-bpypz)2 (1), [Fe(NCSe)(py)]2(μ-bpypz)2 (2), [Fe(NCS)(py)]2(μ-bpytz)2 (3), [Fe(NCSe)(py)]2(μ-bpytz)2 (4), [Fe(NCBH3)(py)]2(μ-bpytz)2 (5). The crystal and molecular structures of 1 and 3 are very similar in their HS–HS forms (HS = high spin d6). In contrast to reported SCO behaviour for precipitated samples of 1, also repeated here, crystals of 1 show only HS–HS behaviour with no spin crossover transition. Complex 3 likewise displays HS–HS magnetism, with very weak antiferromagnetic coupling. Compound 5 displays a well resolved two-step, full spin transition from HS–HS to LS–LS states while compound 2 shows a one step transition. The Mössbauer data for 2 and 5 show unusual features at low temperatures. 相似文献
11.
Bhaskar BiswasAbhijit Pal G. Rama KrishnaC. Malla Reddy Floriana TunaRajarshi Ghosh 《Polyhedron》2011,30(12):2032-2037
Synthesis and single crystal X-ray diffraction studies of four transition metal complexes [Mn(L1)](ClO4)2 (1), [Cu(L1)](ClO4)2 (2), [Ni2(L2)(NCS)6][Ni(L1)] (3) and [Mn(bzpy)(NCS)2] (4) with neutral ligands [L1 = N-(1-pyridin-2-yl-phenylidene)-N′-[2-({2-[(1-pyridin-2-yl phenylidene)amino]ethyl}amino)ethyl]ethane-1,2diamine, L2 = N-(1-pyridin-2-yl-phenylidene)-N′-[2-({2-[(1-pyridin-2-ylphenylidene)amino]ethyl}piperazine-1yl)ethyl]amine, bzpy = 2-benzoylpyridine] are reported. The trinuclear nickel(II) complex 3 is made of a dinuclear anion and a mononuclear cation. Variable-temperature magnetic susceptibility and variable-field magnetisation studies performed on 3 suggest weak antiferromagnetic coupling (J = −0.7 cm−1) between the two metals of the dinuclear entity, but no magnetic interaction between the anionic and cationic counterparts. 相似文献
12.
Deanna M. D’Alessandro Fiona M. FoleyMurray S. Davies Peter C. Junk F. Richard Keene 《Polyhedron》2007
The cations in the solid-state structures of meso-(ΛΔ)-[{Ru(bpy)2}2(μ-bpm)](PF6)4, meso-(ΛΔ)-[{Ru(Me2bpy)2}2(μ-bpm)](tos)4 · 2CH3OH · 4H2O and meso-(ΛΔ)-[{Ru(Me4bpy)2}2(μ-bpm)](tos)4 · 26H2O (bpm = 2,2′-bipyrimidine; bpy = 2,2′-bipyridine; Me2bpy = 4,4′-dimethyl-2,2′-bipyridine; Me4bpy = 4,4′,5,5′-tetramethyl-2,2′-bipyridine; tos− = toluene-4-sulfonate anion) exhibit similar features including comparable bond lengths and angles, and metal–metal separations of 5.56–5.59 Å. The counter-ions present in the structures reside in the clefts above and below the plane of the bridging ligand, but show considerable variation in location compared with their known occupancy in solution. 相似文献
13.
Christopher P. Morley Christopher A. Webster 《Journal of organometallic chemistry》2006,691(20):4244-4249
Room temperature reaction of [Pd2(dba)3]/PR3 or [Pt(C2H4)(PR3)2] (dba = dibenzylideneacetone; R = Et, Bu) with the diselenides (R′Se)2 (R′ = Ph, Fc) yielded the oxidative addition products trans-[M(SeR′)2(PR3)2] (M = Pd, Pt). These have been characterised by multinuclear NMR and UV-Vis spectroscopy, mass spectrometry, and, in the cases of trans-[Pt(SePh)2(PR3)2] (R = Et, Bu) and trans-[Pt(SeFc)2(PBu3)2], also by X-ray crystallography. 相似文献
14.
Manuel Gómez Pilar Gómez-Sal José Manuel Hernández 《Journal of organometallic chemistry》2007,692(11):2291-2298
Trichloro methyl [Nb{η5-C5H3(SiXMe2)(SiMe3)}Cl3Me] (X = Cl, 2; Me, 3), dichloro dimethyl [Nb{η5-C5H3(SiXMe2)(SiMe3)}Cl2Me2] (X = Cl, 4; Me, 5) and tetramethyl [Nb{η5-C5H3(SiXMe2)(SiMe3)}Me4] (X = Me, 6; Cl, 7) niobium complexes were synthesized by treatment of starting tetrachloro derivatives [Nb{η5-C5H3(SiXMe2)(SiMe3)}Cl4] (X = Cl, 1a; Me, 1b) with dimethyl zinc or chloro methyl magnesium in different proportions and conditions. A mixture of trichloro methyl and dichloro dimethyl tantalum complexes [Ta{η5-C5H3(SiClMe2)(SiMe3)}Cl4−xMex] (x = 1, 8; 2, 9) in a 2:1 molar ratio was obtained in the reaction of [Ta{η5-C5H3(SiClMe2)(SiMe3)}Cl4] (1c) with 0.5 equivalents of ZnMe2 in toluene at low temperature. 8 could be isolated as single compound when 1 equivalent of 1c was added to the mixtures of 8 and 9, while the reaction of 1c with 1.5 equivalents of dimethyl zinc gave 9 as unitary product. However, [Ta{η5-C5H3(SiMe3)2}Cl4] (1d) reacts with 0.5 equivalents of alkylating reagent giving the trichloro methyl compound [Ta{η5-C5H3(SiMe3)2}Cl3Me] (10) in good yield. On the other hand, [Ta{η5-C5H3(SiMe3)2}Cl4] (1d) reacts with 2 equivalents of MgClMe in hexane at room temperature giving a mixture of dichloro dimethyl and chloro trimethyl complexes[Ta{η5-C5H3(SiMe3)2}Cl4−xMex] (x = 2, 11; 3, 12), while the use of 4 equivalents of MgClMe converts 1c into the tetramethyl derivative [Ta{η5-C5H3(SiClMe2)(SiMe3)}Me4] (13). Finally, a tetramethyl tantalum complex [Ta{η5-C5H3(SiMe3)2}Me4] (14) was prepared by reaction of [Ta{η5-C5H3(SiXMe2)(SiMe3)}Cl4] (X = Cl, 1c; Me, 1d) with 5 (X = Cl) or 4 (X = Me) equivalents of MgClMe in diethyl ether (X = Cl) or hexane (X = Me), respectively, as solvent. All the complexes were studied by IR and NMR spectroscopy and the molecular structure of the complex 11 was determined by X-ray diffraction methods. 相似文献
15.
Hui-Shuang Zhang Ya-Min Li Long-Sheng Wang Xi-He Huang 《Journal of solid state chemistry》2005,178(5):1349-1355
Three heterometallic 1-D polymers, [{Ni(1,10-phen)2(H2O)}2 {(Mo5O15)(4,4′-dbp)}·(5.75H2O)] (4,4′-dbp=O3PCH2C6H4C6H4CH2PO3) (1), [{Co(1,10-phen)2(H2O)}2 {(Mo5O15)(4,4′-dbp)}·(5.5H2O)] (2) and [{Ni(2,2′-bpy)3}{Ni(2,2′-bpy)2(H2O)} {(Mo5O15)(4,4′-dbp)}·(4.75H2O)] (3), have been synthesized under hydrothermal conditions. Their structures were determined by single crystal X-ray diffraction. The 1-D chains is constructed of [Mo5O15(4,4′-dbp)]4− units, which are further decorated and charge compensated by [M(1,10-phen)2] (M=Ni, Co) or [Ni(2,2′-bpy)2] subunits. The thermogravimetric analyses and magnetic properties of 1 and 2 were studied. 相似文献
16.
Nisha P. Kushwah Amey Wadawale Zoya A. Starikova 《Journal of organometallic chemistry》2009,694(26):4146-4263
The reactions of [M2Cl2(μ-Cl)2(PMe2Ph)2] with mercapto-o-carboranes in the presence of pyridine afforded mono-nuclear complexes of composition, [MCl(SCb°R)(py)(PMe2Ph)] (M = Pd or Pt; Cb° = o-C2B10H10; R = H or Ph). The treatment of [PdCl2(PEt3)2] with PhCb°SH yielded trans-[Pd(SCb°Ph)2(PEt3)2] (4) which when left in solution in the presence of pyridine gave another substitution product, [Pd(SCb°Ph)2(py)(PEt3)] (5). The structures of [PdCl(SCb°Ph)(py)(PMe2Ph)] (1), [Pd(SCb°Ph)2(PEt3)2] (4) and [Pd(SCboPh)2(py)(PEt3)] (5) were established unambiguously by X-ray crystallography. The palladium atom in these complexes adopts a distorted square-planar configuration with neutral donor atoms occupying the trans positions. Thermolysis of [PdCl(SCb°)(py)(PMe2Ph)] (2) in TOPO (trioctylphosphine oxide) at 200 °C gave nanocrystals of TOPO capped Pd4S which were characterized by XRD pattern and SEM. 相似文献
17.
J.G. Ma?ecki 《Polyhedron》2011,30(1):79-85
[RuHCl(CO)(PPh3)2(py)], [RuHCl(CO)(PPh3)2(pyIm)] and [RuCl(CO)(PPh3)2(pyoh)]·2CH3OH complexes (where py = pyridine, pyIm = imidazo[1,2-α]pyridine, pyoh = 2-hydroxy-6-methylpyridine) have been prepared and studied by IR, NMR, UV-Vis spectroscopy and X-ray crystallography. Electronic structures and bonding of the complexes were defined on the basis of DFT method, and the pyridine derivative ligands were compared on the basis of their donor-acceptor properties. Values of the ligand field parameter 10Dq and Racah’s parameters were estimated for the studied compounds, and the luminescence properties were determined. 相似文献
18.
Heinrich Lang Amaya del Villar Thomas Stein Petra Zoufalá Tobias Rüffer Gerd Rheinwald 《Journal of organometallic chemistry》2007,692(23):5203-5210
Complexes of type {cis-[Pt](μ-σ,π-CCPh)2}AgX (3a, [Pt] = (bipy′)Pt, X = FBF3; 3b, [Pt] = (bipy′)Pt, X = FPF5; 3c, [Pt] = (bipy)Pt, X = OClO3; 3d, [Pt] = (bipy′)Pt, X = BPh4; bipy′ = 4,4′-dimethyl-2,2′-bipyridine; bipy = 2,2′-bipyridine) are accessible by combining cis-[Pt](CCPh)2 (1a, [Pt] = (bipy′)Pt; 1b, [Pt] = (bipy)Pt) with equimolar amounts of [AgX] (2a, X = BF4; 2b, X = PF6; 2c, X = ClO4; 2d, X = BPh4). In 3a-3d the platinum(II) and silver(I) ions are connected by σ- and π-bonded phenyl acetylide ligands. When the molar ratio of 1 and 2 is changed to 2:1 then trimetallic [{cis-[Pt](μ-CCPh)2}2Ag]X (8a, [Pt] = (bipy)Pt, X = BF4; 8b, [Pt] = (bipy′)Pt, X = PF6; 8c, [Pt] = (bipy)Pt, X = BF4) is produced. The solid state structure of 8a was determined by single X-ray crystal structure analysis. In 8a the silver(I) ion is embedded between two parallel oriented cis-[Pt](CCPh)2 units. Within this structural arrangement the phenyl acetylides of individual [Pt](CCPh)2 entities possess a μ-bridging position between Pt(II) and Ag(I). In addition, a very weak dative Pt → Ag interaction is found (Pt-Ag 2.8965(3) Å). The respective silver carbon distances Ag-Cα (2.548(7), 2.447(7) Å) and Ag-Cβ (3.042(7), 2.799(8) Å)(PtCαCβPh) confirm this structural motif.Complexes 8a-8c isomerize in solution to form trimetallic [{cis-[Pt](μ-σ,π-CCPh)2}2Ag]X (9a, [Pt] = (bipy)Pt, X = BF4; 9b, [Pt] = (bipy′)Pt, X = PF6; 9c, [Pt] = (bipy)Pt, X = ClO4). In the latter molecules the organometallic cation [{cis-[Pt](μ-σ,π- CCPh)2}2Ag]+ is set-up by two nearly orthogonal positioned [Pt](CCPh)2 entities which are hold in close proximity by the group-11 metal ion. Within this assembly all four PhCC units are η2-coordinated to silver(I). A possible mechanism for the formation of 9 is presented. 相似文献
19.
The new tris(ferrocenylamine) ditertiary phosphine 1,1′-{FcCH2N(CH2PPh2)CH2(η5-C5H4)}2Fe [Fc = (η5-C5H5)Fe(η5-C5H4)] has been prepared along with two coordination complexes. All compounds have been characterised by a combination of spectroscopic and analytical methods. The single crystal X-ray structure of the pentametallic Ru2Fe3 complex 5 has been determined. 相似文献
20.
Four novel coordination polymers constructed from flexible pamoic acid, namely [Co(pam)(4,4′-bipy)]n·nH2O (1), [Ni(pam)(4,4′-bipy)(H2O)2]n·2nCH3CN (2), [Cd(pam)(py)2]n·npy (3) and [Mn2(pam)2(py)6(H2O)2]n·2npy (4), (H2pam = pamoic acid, 4,4′-bipy = 4,4′-bipyridine, py = pyridine), have been synthesized and characterized by elemental analysis, infrared spectra and X-ray crystallography. Complex 1 is a 2-D coordination polymer constructed from chelating bis-bidentate pam and 4,4′-bipyridine bridging ligands. Complex 2 is a 2-D coordination polymer assembled by bis-monodentate pam and 4,4′-bipyridine, where acetonitrile is filled in the rectangle channels. Both 2-D coordination polymers display undulated (4,4) grid layers as sql topology. Complex 3 displays a 1-D polymeric chain using chelating bis-bidentate pam as bridging ligand. Complex 4 exhibits an interesting bis-monodentate pam-Mn(II) 1-D polymeric chain, in which exist two-type six-coordinated manganese centers. Mn(1) is bound to four pyridine ligands, whereas Mn(2) is combined to two pyridine and two H2O molecules. Their thermal stabilities have been investigated. Cadmium complex 3 displays strong green luminescence with emission maximum at 543 nm. 相似文献