共查询到20条相似文献,搜索用时 18 毫秒
1.
Roland Wilberger Christoph Krinninger Holger Piotrowski Peter Mayer Manfred Ossberger Ingo‐Peter Lorenz 《无机化学与普通化学杂志》2004,630(10):1495-1500
The pentacarbonylhalogene complexes [XM(CO)5] (M = Mn, Re; X = Cl, Br) ( 1a – 2b ) react with 2,2‐dimethylaziridine by thermally induced substitution reaction to give the neutral bis‐aziridine complexes [M(X)(CO)3Az2] (Az = N(H)C2H2Me2) ( 3a – 4b ). As a result of the X‐ray structure analyses, the metal atoms are octahedrally configurated in the facial arrangement; the intact three‐membered rings coordinate through their distorted tetrahedrally configurated N atoms. All compounds 3a – 4b are stable with respect to the directed thermal alkene elimination to give the corresponding nitrene complexes (CO)4(X)M=NH; their IR, 1H and 13C{1H} NMR, and MS spectra are reported and discussed. 相似文献
2.
Minghuey Shieh Horng-Sun Chen Huey-Yea Yang Chuen-Her Ueng 《Angewandte Chemie (International ed. in English)》1999,38(9):1252-1254
The first Te–Mn–CO clusters were obtained by the thermal reaction of K2TeO3 with [Mn2(CO)10] in MeOH. The basicity of the μ4-Te ligand in the octahedral cluster anion [(μ4-Te)2Mn4(CO)12]2− is demonstrated by its binding to the fragment [(TeMe2)Mn(CO)4]+ in an axial fashion to afford the novel cluster 1 . 相似文献
3.
Synthesis and Characterization of Manganese(I) Carbonyl Complexes of the Type [(OC)4Mn{μ‐P(R)Aryl}]2
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Metalation of secondary phosphanes HPRR′ [R = R′ = C6H4‐4‐Me, C6H3‐3,5‐Me2 ( 3 ), C6H4‐4‐NMe2 ( 4 ); R/R′ = Ph/cHex] with Mn2(CO)10 in boiling xylene (mixture of isomers), until the evolution of gaseous carbon monoxide ceases, leads to the formation of the dinuclear complexes of the type [(OC)4Mn(μ‐PRR′)]2 [R = R′ = C6H4‐4‐Me ( 5 ), C6H3‐3,5‐Me2 ( 6 ), R/R′ = Ph/cHex ( 7 ), R = R′ = C6H4‐4‐NMe2 ( 8 )] with poor to moderate yields. These manganese(I) complexes are only sparingly soluble or even nearly insoluble in hydrocarbons at room temperature. Planar four‐membered Mn2P2 rings represent the central moiety with four carbonyl ligands at each manganese(I) atom. The steric demand of the P‐bound substituents influences the Mn–P bond lengths as well as the P–Mn–P bond angles. 相似文献
4.
By reacting Mn2(CO)10 and TeI4 in the ionic liquid[BMIm][OTf] (1‐butyl‐3‐methylimidazolium trifluromethanesulfonate), brick‐red crystals of [BMIm][(Te2)3{Mn(CO)3}2{Mn(CO)4}3]are obtained. The title compound contains the carbonyl anion[(Te2)3{Mn(CO)3}2{Mn(CO)4}3]–. Herein, three formal Te22– units and two formal Mn(CO)3+ fragments establish a distorted heterocubane‐like Te6Mn2 structure. Three edges of this heterocubane are furthermore capped by Mn(CO)4+ fragments. The resulting Te6Mn5 building unit, moreover, looks very similar to the P113– anion – the so‐called ufosane. The mean distances Te–Te and Te–Mn are observed with 277.6 and 264.7 pm, respectively. In addition to single‐crystal structure analysis, the title compound is characterized by infrared spectroscopy (FT‐IR), thermogravimetry (TG) and energy‐dispersive X‐ray (EDX) analysis. 相似文献
5.
Octafluoro‐1, 2‐dimethylenecyclobutane, a Perfluorinated Diene Ligand — Carbonyl(η5‐cyclopentadienyl)(η4‐octafluoro‐1, 2‐dimethylenecyclobutane)manganese The [2+2]‐cycloaddition product of tetrafluoroallene ( 1 ), octafluoro‐1, 2‐dimethylenecyclobutane ( 2 ) reacts with tricarbonyl(η5‐cyclopentadienyl)manganese ( 4 ) replacing two carbonyl ligands to give carbonyl(η5‐cyclopentadienyl)(η4‐octafluoro‐1, 2‐dimethylenecyclobutane)manganese ( 5 ). According to the IR spectrum of 5 , the ligand 2 is a strong π acceptor. Among the less volatile by‐products of the dimerizationof 1 , the hydrolysis product of its trimer could be structurally characterized by X‐ray diffraction as the spirocyclic compound decafluoro‐5‐methylene‐spiro[3.3]heptane‐2‐carboxylic acid ( 3 ). The structure of 5 was also determined by an X‐ray crystal structure determination. 相似文献
6.
Roland Wilberger Holger Piotrowski Marcus Warchhold Ingo‐Peter Lorenz 《无机化学与普通化学杂志》2003,629(14):2485-2492
Novel Neutral and Cationic Mono‐Aziridine Complexes of the Type [CpMn(CO)2Az], [CpCr(NO)2Az]+, and [(Ph3P)(CO)4ReAz]+ via CO‐, Hydride‐, and Chloride‐Elimination Reactions The monoaziridine complexes 1 — 5 are obtained by three differently induced substitution reactions. The photolytically induced CO substitution reaction of [CpMn(CO)3] with 2, 2‐dimethylaziridine leads to the neutral N‐coordinate aziridine complex [Cp(CO)2Mn{$\overline{N(H)CMe2C}$ H2}] ( 1 ). The protonation of [(Ph3P)(CO)4ReH] with CF3SO3H and consecutive treatment with 2, 2‐dimethylaziridine or 2‐ethylaziridine gives the salt‐like aziridine complexes [(Ph3P)(CO)4Re{$\overline{N(H)CMe2C}$ H2}](CF3SO3) ( 2 ) or [(Ph3P)(CO)4Re{ H2}](CF3SO3) ( 3 ) by hydride elimination reactions. The like‐wise salt‐like complexes [Cp(NO)2Cr{$\overline{N(H)CMe2C}$ H2}](BF4) ( 4 ) and [Cp(NO)2Cr{ H2}](CF3SO3) ( 5 ) are synthesized from [CpCr(NO)2Cl] by chloride elimination with AgX (X = BF4, CF3SO3) in the presence of 2, 2‐dimethylaziridine or 2‐ethylaziridine, respectively. As a result of X‐ray structure analyses, the metal atoms are trigonal pyramidally ( 1, 4, 5 ) or octahedrally ( 2, 3 , cis‐position) configurated; the intact three‐membered rings coordinate through the distorted tetrahedrally configurated N atoms. All compounds 1‐5 are stable with respect to the directed thermal alkene elimination to give the corresponding nitrene complexes; the IR, 1H‐ and 13C{1H}‐NMR, and MS spectra are reported and discussed. 相似文献
7.
WANG Jing-ping LI Ji-li NIU Jing-yang Institute of Molecular Crystal Engineering School of Chemistry Chemical Engineering Henan University Kaifeng P. R. China 《高等学校化学研究》2008,24(6)
The polyoxoanion incorporated {Mn(CO)3+} complex, (n-Bu4N)2[Mo6O16(OCH3)2{HOCH2C(CH2O)3}2· {Mn(CO)3}2](1), has been synthesized by the reaction of (n-Bu4N)4[Mo8O26] with Mn(CO)5Br in methanol, in the presence of C(CH2OH)4. The complex 1 has been characterized by IR, UV-Vis, X-ray single crystal diffraction, and TG. Crystal data for the complex 1: C25H48MnMo3NO16 (1), Triclinic P1, a=0.9405(3) nm, b=1.3351(4) nm, c=1.5455(4) nm, α=103.206(5)o, β=102.165(5)o, γ=100.784(5)o, V=1.7896(9) nm3, Z=2, R1=0.0703, wR... 相似文献
8.
Hans‐Christian Bttcher Marion Graf Kurt Merzweiler Christoph Wagner 《无机化学与普通化学杂志》2000,626(6):1335-1340
Coordinatively Unsaturated Diruthenium Complexes: Synthesis and X‐ray Crystal Structures of [Ru2(CO)3L(μ‐η1 : η2‐C≡CPh)(μ‐PtBu2)(μ‐Ph2PCH2PPh2)] (L = CO, PnBu3) [Ru2(CO)4(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 1 ) reacts with several phosphines (L) in refluxing toluene under substitution of one carbonyl ligand and yields the compounds [Ru2(CO)3L(μ‐H)(μ‐PtBu2)(μ‐dppm)] (L = PnBu3, 2 a ; L = PCy2H, 2 b ; L = dppm‐P, 2 c ; dppm = Ph2PCH2PPh2). The reactivity of 1 as well as the activated complexes 2 a – c towards phenylethyne was studied. Thus 1 , 2 a and 2 b , respectively, react with PhC≡CH in refluxing toluene with elimination of dihydrogen to the acetylide‐bridged complexes [Ru2(CO)4(μ‐η1 : η2‐C≡CPh)(μ‐PtBu2)(μ‐dppm)] ( 3 ) and [Ru2(CO)3L(μ‐η1 : η2‐C≡CPh)(μ‐PtBu2)(μ‐dppm)] ( 4 a and 4 b ). The molecular structures of 3 and 4 a were determined by crystal structure analyses. 相似文献
9.
Three new alkali metal transition metal sulfate‐oxalates, RbFe(SO4)(C2O4)0.5 · H2O and CsM(SO4)(C2O4)0.5 · H2O (M = Mn, Fe) were prepared through hydrothermal reactions and characterized by single‐crystal X‐ray diffraction, solid state UV/Vis/NIR diffuse reflectance spectroscopy, infrared spectra, thermogravimetric analysis, and powder X‐ray diffraction. The title compounds all crystallize in the monoclinic space group P21/c (no. 14) with lattice parameters: a = 7.9193(5), b = 9.4907(6), c = 8.8090(6) Å, β = 95.180(2)°, Z = 4 for RbFe(SO4)(C2O4)0.5 · H2O; a = 8.0654(11), b = 9.6103(13), c = 9.2189(13) Å, β = 94.564(4)°, Z = 4 for CsMn(SO4)(C2O4)0.5 · H2O; and a = 7.9377(3), b = 9.5757(4), c = 9.1474(4) Å, β = 96.1040(10)°, Z = 4 for CsFe(SO4)(C2O4)0.5 · H2O. All compounds exhibit three‐dimensional frameworks composed of [MO6] octahedra, [SO4]2– tetrahedra, and [C2O4]2– anions. The alkali cations are located in one‐dimensional tunnels. 相似文献
10.
《Journal of Coordination Chemistry》2012,65(15):1655-1665
The reactivity of mixed [organohydrazido(1-)][organohydrazido(2-)]molybdenum(VI) complexes [Mo(NHNRPh)(NNRPh)(acac)X2] {R?=?Ph, X?=?Br (1); R?=?Ph, X?=?I (2) and R?=?Me; X?=?I (3)} with tertiary phosphines as PPh3, PMePh2 and PMe2Ph are examined. The syntheses of [Mo(NNPh2)2Br2(PPh3)] (4), [Mo(NNPh2)2Br2(PMePh2)2] (5), [Mo(NNPh2)2Br2(PMe2Ph)2] (6), [Mo(NNPh2)2(acac)I(PPh3)] (7), [Mo(NNPh2)2(acac)(PMePh2)2]+I? (8) and [Mo(NNMePh)2(acac)(PMePh2)2]+I? (9) are reported. All complexes were characterized by elemental analysis, UV-visible, IR, 1H and 31P{H} NMR spectroscopy. 相似文献
11.
Perfluoromethyl Element Ligands. XLIII [1] Novel Synthetic Routes to Binuclear Complexes of the Type MM′(CO)8ER2X (M/M′ = Mn/Mn, Mn/Re, Re/Re; E = P, As; R = CF3, Me; X = Hal, ) Mn(CO)5I reacts with compounds of the type (CF3)2EAsMe2 (E = P, As) as with the symmetric E2(CF3)4 ligands in the first step with cleavage of the E‐As bond to yield the pro ducts (CO)5MnE(CF3)2 and Me2AsI. Reaction of the mononuclear complexes with excess of Mn(CO)5I leads in good yields to the known dinuclear compounds (CO)4Mn[E(CF3)2, I]Mn(CO)4 and CO. Me2AsI, the second product of the EAs cleavage, attacks the starting compound Mn(CO)5I giving cis‐Mn(CO)4I(AsMe2I) and CO. This result encouraged us to thoroughly investigate the preparation of cis‐M(CO)4X(EMe2Y) complexes with most of the possible combinations of M = Mn, Re; E = P, As and X, Y = Cl, Br, I. An alternative route to these compounds was opened by the cleavage of the dinuclear manganese or rhenium halides M2(CO)8X2 with the halophosphanes or ‐arsanes Me2EY. This route was found to be especially advantageous for the preparation of the rheniumcarbonyl precursors, since milder conditions than for the CO‐substitution in Re(CO)5X compounds are sufficient for the halogen‐bridged dinuclear complexes. Cis‐M(CO)4X(EMe2Y) complexes were used as precursors for the synthesis of novel homo‐ and heterodinuclear complexes of the type (CO)4M(EMe2, X)M′(CO)4 by reacting the EY function with transition metal carbonylates Kat[M′(CO)5] (Kat = Na, Bu4N, Ph4As). Thus the preparation of a wide range of complexes was possible, which before had been successfully prepared by the direct reaction of Mn2(CO)10 with Me2EX only in few cases, e. g. with Me2AsI. Spectroscopic investigations, using the CO valence frequencies and the 1H‐NMR data of the ligands EMe2Y or of the Me2E bridges, were applied to study the influence of the variables M, M′, E, X, Y and Kat on the reactivity of the mononuclear complexes and the bonding situation in both the mono‐ and the dinuclear systems. The new compounds were characterized by spectroscopic (IR, NMR, MS) and analytic methods (C, H). 相似文献
12.
Coordinatively Unsaturated Diiron Complexes: Synthesis and Crystal Structures of [Fe2(CO)4(μ‐H)(μ‐PtBu2)(μ‐Ph2PCH2PPh2)] and [Fe2(CO)4(μ‐CH2)(μ‐H)(μ‐PtBu2)(μ‐Ph2PCH2PPh2)] [Fe2(μ‐CO)(CO)6(μ‐H)(μ‐PtBu2)] ( 1 ) reacts spontaneously with dppm (dppm = Ph2PCH2PPh2) to give [Fe2(μ‐CO)(CO)4(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 2 c ). By thermolysis or photolysis, 2 c loses very easily one carbonyl ligand and yields the corresponding electronically and coordinatively unsaturated complex [Fe2(CO)4(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 3 ). 3 exhibits a Fe–Fe double bond which could be confirmed by the addition of methylene to the corresponding dimetallacyclopropane [Fe2(CO)4(μ‐CH2)(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 4 ). The reaction of 1 with dppe (Ph2PC2H4PPh2) affords [Fe2(μ‐CO)(CO)4(μ‐H)(μ‐PtBu2)(μ‐dppe)] ( 5 ). In contrast to the thermolysis of 2 c , yielding 3 , the heating of 5 in toluene leads rapidly to complete decomposition. The reaction of 1 with PPh3 yields [Fe2(CO)6(H)(μ‐PtBu2)(PPh3)] ( 6 a ), while with tBu2PH the compound [Fe2(μ‐CO)(CO)5(μ‐H)(μ‐PtBu2)(tBu2PH)] ( 6 b ) is formed. The thermolysis of 6 b affords [Fe2(CO)5(μ‐PtBu2)2] and the degradation products [Fe(CO)3(tBu2PH)2] and [Fe(CO)4(tBu2PH)]. The molecular structures of 3 , 4 and 6 b were determined by X‐ray crystal structure analyses. 相似文献
13.
Wen‐Zhen Wang Xin Liu Dai‐Zheng Liao Zong‐Hui Jiang Shi‐Ping Yan Geng‐Lin Wang 《无机化学与普通化学杂志》2003,629(9):1585-1588
A new ruthenium(II) complex [Ru(NO2)4(CO)(H2O)]Cl2 · 2H2O has been prepared and characterized structurally. The compound crystallizes in monoclinic space group C2 /m, with the unit cell parameters a = 12.913(2), b = 14.605(2), c = 7.4494(1)Å, ß =121.49(2)°; V = 1198.0(3)Å3, Z = 4, Dc = 2.429 Mgm—3; μ = 1.83 mm—1; R = 0.0455, wR = 0.1552. The complex contains four neutral NO2 ligands. The ruthenium atom is six‐coordinated to four nitrogen atoms of nitrogen dioxide, one carbon atom from carbon monoxide and one oxygen atom from water molecule, forming slightly distorted octahedral coordination. The preparation procedure has been discussed. 相似文献
14.
Hans‐Christian Bttcher Marion Graf Kurt Merzweiler Christoph Wagner 《无机化学与普通化学杂志》2000,626(2):597-603
Coordinatively Unsaturated Diruthenium Complexes: Synthesis and X‐Ray Crystal Structures of [Ru2(CO)4(μ‐H)(μ‐S)(μ‐PtBu2)(μ‐Ph2PCH2PPh2)], [Ru2(CO)4(μ‐X)(μ‐PtBu2)(μ‐Ph2PCH2PPh2)] (X = Cl, S2CH) [Ru2(CO)4(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 1 ) reacts in benzene with elemental sulfur to the addition product [Ru2(CO)4(μ‐H)(μ‐S)(μ‐PtBu2)(μ‐dppm)] ( 2 ) (dppm = Ph2PCH2PPh2). 2 is also obtained by reaction of 1 with ethylene sulfide. The reaction of 1 with carbon disulfide yields with insertion of the CS2 into the Ru2(μ‐H) bridge the dithioformato complex [Ru2(CO)4(μ‐S2CH)(μ‐PtBu2)(μ‐dppm)] ( 3 ). Furthermore, 1 reacts with [NO][BF4] to the complex salt [Ru2(CO)4(μ‐NO)(μ‐H)(μ‐PtBu2)(μ‐dppm)][BF4] ( 4 ), and reaction of 1 with CCl4 or CHCl3 affords spontaneously [Ru2(CO)4(μ‐Cl)(μ‐PtBu2)(μ‐dppm)] ( 5 ) in nearly quantitative yield. The molecular structures of 2 , 3 and 5 were confirmed by crystal structure analyses. 相似文献
15.
Coordinatively Unsaturated Diruthenium Complexes: Synthesis and X‐ray Crystal Structures of [Ru2(CO)n(μ‐H)(μ‐PtBu2)(μ‐Ph2PCH2PPh2)] (n = 4; 5) and [Ru2(CO)4(μ‐CH2)(μ‐H)(μ‐PtBu2)(μ‐Ph2PCH2PPh2)] The reaction of [Ru2(μ‐CO)(CO)5(μ‐H)(μ‐PtBu2)(tBu2PH)] ( 2 ) with dppm yields the dinuclear species [Ru2(μ‐CO)(CO)4(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 3 ) (dppm = Ph2PCH2PPh2). Under thermal or photolytic conditions 3 loses very easily one carbonyl ligand and affords the corresponding electronically and coordinatively unsaturated complex [Ru2(CO)4(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 4 ). 4 is also obtainable by an one‐pot synthesis from [Ru3(CO)12], an excess of tBu2PH and stoichiometric amounts of dppm via the formation of [Ru2(CO)4(μ‐H)(μ‐PtBu2)(tBu2PH)2] ( 1 ). 4 exhibits a Ru–Ru double bond which could be confirmed by addition of methylene to the dimetallacyclopropane [Ru2(CO)4(μ‐CH2)(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 5 ). The molecular structures of 3 , 4 and 5 were determined by X‐ray crystal structure analyses. 相似文献
16.
Hans‐Christian Bttcher Marion Graf Kurt Merzweiler Christoph Wagner 《无机化学与普通化学杂志》2001,627(5):903-908
Heterobinuclear Complexes: Synthesis and X‐ray Crystal Structures of [RuRh(μ‐CO)(CO)4(μ‐PtBu2)(tBu2PH)], [RuRh(μ‐CO)(CO)3(μ‐PtBu2)(μ‐Ph2PCH2PPh2)], and [CoRh(CO)4(μ‐H)(μ‐PtBu2)(tBu2PH)] [Ru3Rh(CO)7(μ3‐H)(μ‐PtBu2)2(tBu2PH)(μ‐Cl)2] ( 2 ) yields by cluster degradation under CO pressure as main product the heterobinuclear complex [RuRh(μ‐CO)(CO)4(μ‐PtBu2)(tBu2PH)] ( 4 ). The compound crystallizes in the orthorhombic space group Pcab with a = 15.6802(15), b = 28.953(3), c = 11.8419(19) Å and V = 5376.2(11) Å3. The reaction of 4 with dppm (Ph2PCH2PPh2) in THF at room temperature affords in good yields [RuRh(μ‐CO)(CO)3(μ‐PtBu2)(μ‐dppm)] ( 7 ). 7 crystallizes in the triclinic space group P 1 with a = 9.7503(19), b = 13.399(3), c = 15.823(3) Å and V = 1854.6 Å3. Moreover single crystals of [CoRh(CO)4(μ‐H)(μ‐PtBu2)(tBu2PH)] ( 9 ) could be obtained and the single‐crystal X‐ray structure analysis revealed that 9 crystallizes in the monoclinic space group P21/a with a = 11.611(2), b = 13.333(2), c = 18.186(3) Å and V = 2693.0(8) Å3. 相似文献
17.
[Fe2(μsb‐CO)(CO)3(NO)(μ‐PtBu2)(μ‐Ph2PCH2PPh2)]: Synthesis, X‐ray Crystal Structure and Isomerization Na[Fe2(μ‐CO)(CO)6(μ‐PtBu2)] ( 1 ) reacts with [NO][BF4] at —60 °C in THF to the nitrosyl complex [Fe2(CO)6(NO)(μ‐PtBu2)] ( 2 ). The subsequent reaction of 2 with phosphanes (L) under mild conditions affords the complexes [Fe2(CO)5(NO)L(μ‐PtBu2)], L = PPh3, ( 3a ); η‐dppm (dppm = Ph2PCH2PPh2), ( 3b ). In this case the phosphane substitutes one carbonyl ligand at the iron tetracarbonyl fragment in 2 , which was confirmed by the X‐ray crystal structure analysis of 3a . In solution 3b loses one CO ligand very easily to give dppm as bridging ligand on the Fe‐Fe bond. The thus formed compound [Fe2(CO)4(NO)(μ‐PtBu2)(μ‐dppm)] ( 4 ) occurs in solution in different solvents and over a wide temperature range as a mixture of the two isomers [Fe2(μsb‐CO)(CO)3(NO)(μ‐PtBu2)(μ‐dppm)] ( 4a ) and [Fe2(CO)4(μ‐NO)(μ‐PtBu2)(μ‐dppm)] ( 4b ). 4a was unambiguously characterized by single‐crystal X‐ray structure analysis while 4b was confirmed both by NMR investigations in solution as well as by means of DFT calculations. Furthermore, the spontaneous reaction of [Fe2(CO)4(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 5 ) with NO at —60 °C in toluene yields a complicated mixture of products containing [Fe2(μ‐CO)(CO)4(μ‐H)(μ‐PtBu2)(μ‐dppm)] ( 6 ) as main product beside the isomers 4a and 4b occuring in very low yields. 相似文献
18.
Two special manganese complexes [Mn(II)(acac?)2(4,4′‐bipy)]n (bipy=4,4′‐bipyridine) (complex 1 ) and [Mn(III)(acac?)3]·4CO(NH2)2 (acacH=acetylacetone) (complex 2 ) were synthesized in the same strategy by solvothermal method. Single crystal X‐ray diffraction revealed the complex 1 consists of one‐dimensional infinite coordination chain, with the manganese centers bridged by 4,4′‐bipy. And free carbamides of complex 2 connect with each other through the hydrogen bonds to form a 14‐membered carbamide ring and a zig‐zag plane. Both enantiomers of Mn(III)(acac?)3 exist in the structure, forming a racemate. Furthermore, these enantiomers and those zig‐zag planes are linked with hydrogen bonds to form an unique spatial network. 相似文献
19.
Monika Sieger Klaus Hübler Thomas Scheiring Torsten Sixt Stanislav Zalis Wolfgang Kaim 《无机化学与普通化学杂志》2002,628(11):2360-2364
The new complexes (RN=CH‐CH=NR)Co(NO)(CO), R = isopropyl ( 1 ), 2,6‐diisopropylphenyl ( 2 ) and p‐tolyl ( 3 ), were synthesized and spectroscopically characterized. Compounds 1 and 2 could be crystallized for X‐ray structure analysis, CO/NO disorder was observed for 1 . The results indicate a negligible amount of charge transfer from the Co(NO)(CO) moiety to the 1, 4‐diazabutadiene acceptor ligands in the ground state, in agreement with DFT calculations on 1 and as similarly reported for related 1, 4‐diaza‐1, 3‐butadiene complexes of Ni(CO)2 and Fe(NO)2. 相似文献
20.
Nabila El-Azzouzi Francisco Hueso-UreñaNuria A. Illán-Cabeza Miguel N. Moreno-Carretero 《Polyhedron》2010
The XRD structure of two seven-coordinated Mn(II) complexes with the formula [Mn(phen)(nicot)(NO3)(H2O)]·EtOH·H2O (1) and [Mn(phen)(NO3)2(H2O)] (2) are reported. The 2,9-dimethyl-1,10-phenanthroline, nitrato and nicotinato anions act as bidentate ligands, with Mn–N distances of 2.21–2.29 Å and Mn–O distances of 2.17–2.40 Å. In both compounds, the water molecule seems to be the strongest coordinated ligand, with bond distances of 2.139(2) Å in 1 and 2.195(2) Å in 2. The average ratio between coordinated unidentate and bidentate bond lengths less than the unity justifies, from an energetical point of view, the shape of the coordination polyhedra. In the structure of 1, the coordination polyhedron may be best-described as a distorted pentagonal bipyramid with a nitrogen from phenanthroline and the water molecule occupying the apical sites. The polyhedron shape for 2 is close to a square-capped trigonal prism, the capping site being occupied by the water molecule. The crystal structures are built by H-bonded bidimensional sheets piled up by π–π stacking of the partially interpenetrated aromatic moieties of adjacent layers. 相似文献