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1.
Richard P. Rosen Gregory L. Geoffroy Clifford Bueno Melvyn Rowen Churchill Richard B. Ortega 《Journal of organometallic chemistry》1983,254(1):89-103
The new complex Ru3(CO)9(PPh2H)3 (I) was prepared by the direct thermal reaction of Ru3(CO)12 with PPh2 H and was spectroscopically characterized. Irradiation of I with λ ≥ 300 nm leads to the formation of Ru2(μ-PPh2)2(CO)6 (II) and three new phosphido-bridged complexes, Ru3(μ-H)2(μ-PPh2)2(CO)8 (III), Ru3(μ-H)2(μ-PPh2)2(CO)7(PPh2H) (IV) and Ru3(μ-H)(μ-PPh2)3(CO)7 (V). These complexes have been characterized spectroscopically and Ru3 (μ-H)(μ-PPh2)3(CO)7 by a complete single crystal X-ray structure determination. It crystallizes in the space group P21/n with a 20.256(3), b 22.418(6), c 20.433(5) Å, β 112.64(2)°, V 8564(4) Å3, and Z = 8. Diffraction data were collected on a Syntex P21 automated diffractometer using graphite-monochromatized Mo-Kα radiation, and the structure was refined to RF 4.76% and RwF 5.25% for the 8,847 independent reflections with F0 > 6σ(F0). The structure consists of a triangular array of Ru atoms with seven terminal carbonyl ligands, three bridging diphenylphosphido ligands which bridge each of the RuRu bonds, and the hydride ligand which bridges one RuRu bond. Complex IV was also shown to give V upon photolysis and is thus an intermediate in the photoinduced formation of V from I. 相似文献
2.
Melvyn Rowen Churchill Clifford Bueno David A. Young 《Journal of organometallic chemistry》1981,213(1):139-150
The species FeRu3(CO)13(μ-PPH2)2, synthesized from Ru3(CO)12 and Fe(CO)4(Ph2PPPh2),has been characterized both spectroscopically and via a single-crystal X-ray structural analysis. This complex crystallizes in the centrosymmetric triclinic space group P [No. 2, Ci1] with a 10.066(3), b 12.899(3), c 17.003(4) Å, α 111.89(2), β 91.02(2), γ 102.00(2)°, V 1992.7(9) Å3, Z 2, ?(obsd) 1.79(2) g cm-3 and ?(calcd) 1.82 cm-3. Diffraction data were collected with a Syntex P21 automated four-circle diffractometer and the structure was refined to RF 6.0% and RWF 3.6% for all 5213 reflections (RF 3.8%, RWF 3.6% for those 4140 reflections with |Fo|> 3σ(|Fo|).The metal atoms define a planar triangulated rhombus, with atoms Ru(1) and Ru(2) at the bridgehead, and Fe(1) and Ru(3) at the acute apices. Fe(1) is linked to four terminal carbonyl ligands and is associated with the heteronuclear bonds Fe(1)Ru(1) 2.861(1) Å and Fe(1)Ru(2) 2.868(1) Å. The ruthenium atoms are each bonded to three terminal carbonyl groups. The retheniumruthenium distances are Ru(1)Ru(2) 3.098(1), Ru(1)Ru(3) 3.147(1), and Ru(2)Ru(3) 3.171(1) Å. The structure is completed by Ph2P bridges across the Ru(1)Ru(3) and Ru(2)(ru(3) vectors (<Ru(1)P(1)Ru(3) 84.89(5)° and <Ru(2)P(2)Ru(3) 85.56(6)°). 相似文献
3.
The reaction of M3(CO)12 (M = Ru, Fe) with excess bi-2,7-cyclooctadienyl (C16H22) 1 gave a mononuclear complex M(CO)3(1,2,1′-2′-η4-C16H22), 2a (M = Ru) or 3a (M = Fe), in good yield. Treatment of 2a with Fe3(CO)12 or reaction of 3a with Ru3(CO)12 gave the heterobimetallic complex RuFe(CO)6(C10H22) consisting of a ruthenacyclopentadiene unit coordinated to an Fe(CO)3 fragment, as confirmed by 1H NMR and X-ray studies. The corresponding homobimetallic complex Ru2(CO)6(C16H22) was obtained from the 1:1 reaction of 2a with Ru3(CO)12, while the direct reaction of 1 with Ru3(CO)12 gave Ru2(CO)6(C16H20) preferentially with a loss of two hydrogen atoms. The pathway for formation of these bimetallic complexes was interpreted as a dehydrogenative metallacyclization followed by hydrogen transfer. 相似文献
4.
The title compound has been prepared by reaction of (C5H5)2Cr with oxindole (indole with CO in place of CH2 at the 2-position). Red single crystals belong to space group P21/c with a = 10.107(4) Å, b = 22.496(7) Å, c = 9.210(3) Å, β = 93.26(3)°, V = 2091(2), and Z = 2. The centrosymmetric molecule has a CrCr distance of 2.495(4) Å. The mean CrO and CrN distances for the bonds to bridging oxindolate anions are 2.024(7) and 2.065(8) Å, respectively. There is an oxindole molecule bound at each end with a CrO axial bond of length 2.341(8) Å and a hydrogen bond from the oxindole NH group to an equatorial oxygen atom of length 2.83(1) Å. The significance of this compound with respect to CrCr bonding is discussed. 相似文献
5.
The structure of Mn(NO)3PPh3 has been analyzed by single-crystal X-ray diffraction. It shows a tetrahedral geometry with essentially linear nitrosyl groups, and an eclipsed configuration around the MnP bond. Average distances and angles are: MnN 1.686(7) Å, MnP 2.315(2) Å, NO 1.165(10) Å, PC 1.815(4) Å, MnNO 177.2(7)°, PMnN 103.6(2)°, NMnN 114.7(4)°. Final R factor 7.3% for 2064 non-zero reflections. The structure of the five-coordinate nitrito complex Mn(NO)2(ONO)(PEt3)2 is also mentioned briefly. 相似文献
6.
Michael I. Bruce Ernst Horn Michael R. Snow Michael L. Williams 《Journal of organometallic chemistry》1983,255(2):255-262
The olefinic tertiary phospine complex Ru3(CO)10(μ-η2, P-CH2CHC6H4PPh2) is converted to the title μ4-alkyne-Ru4 cluster at 135°C; the latter is also formed from H2Ru3(μ3-η2, P-HCCC6H4PPh2)(CO)8 and Ru3(CO)12. Crystals of the Ru4 complex are monoclinic, space group P21, with a 8.700(3), b 17.611(3), c 11.926(2) Å, β 102.720(3)°, with Z = 2; 1702 data (I > 2.5 (σ)I) were refined to R = 0.026, Rw = 0.028. The molecule contains a distorted octahedral Ru4C2 core, one carbon of which is attached to an o-C6H4PPh2 moiety coordinated via P to a wing-tip Ru of the Ru4 butterfly. 相似文献
7.
Anne Astier Jean-Claude Daran Yves Jeannin Catherine Rigault 《Journal of organometallic chemistry》1983,241(1):53-68
Syntheses and single-crystal X-ray diffraction studies have been completed on two cycloruthenapentadienyl (CO)6Ru2L2 derivatives, with L = CH2OHC = CCH2OH and C2H5C=CCH2CH2OH respectively. Crystal data are as follows: for [(CO)3RuC4(CH2OH)4]Ru(CO)3·H2O, P21/c, a 13.72(1), b 9.501(4), c 14.86(1) Å, β 101.10(6)°, Rw = 0.052 for 1911 reflections; for [(CO)3RuC4(CH2CH2OH)2(C2H5)2]Ru(CO)3, P21/c, a 9.191(3), b 16.732(4), c 14.903(3) Å, β 113.61(4)°, Rw = 0.042 for 2865 reflections. Both compounds are built up from binuclear units, each unit being regarded as a Ru(CO)3 fragment π-bonded to a cycloruthenapentadienyl ring. The molecular parameters are compared with those of known cyclometallapentadienyl complexes of transition metals. The presence of a semi-bridging CO group is discussed. 相似文献
8.
Michael I. Bruce Brian K. Nicholson Jennifer M. Patrick Allan H. White 《Journal of organometallic chemistry》1983,254(3):361-369
The X-ray structure of H4Ru4(CO)9(PMe2Ph)[P(OC6H4Me-p)3][P(OCH2)3CEt], a chiral cluster complex, has been determined. The complex is triclinic, space group P, a 19.812(7), b 14.299(4), c 10.323(4) Å, α 100.09(3), β 98.18(3), γ 102.23(3)°. The unit cell contains an enantiomeric pair of molecules. The Ru4 core contains two short (av. 2.785 Å) and four long (2.967 Å) RuRu separations with approximate D2d symmetry. RuP separations are 2.254(6) Å [to P(OCH2)3CEt], 2.270(6) Å [to P(OC6H4Me-p)3] and 2.326(7) Å [to PMe2Ph]; all P-donor ligands are trans to short RuRu vectors. 相似文献
9.
C. Anklin P.S. Pregosin F. Bachechi P. Mura L. Zambonelli 《Journal of organometallic chemistry》1981,222(1):175-185
Platinum(II) and palladium(II) complexes containing chelating acyl ligands have been synthesized from salicylaldehyde, 2-hydroxynaphthaldehyde and 2-hydroxy-3-methoxybenzaldehyde. The platinum(II) complexes [Pt(acyl)L2], acyl OC6H4CO, OC10H6CO, O(m-CH3OC6H3CO), L tertiary phosphine, 1/2 diphenylphosphinoethane, can be isolated with both monodentate and chelating diphosphines, whereas for palladium only the compounds with chelating phosphines are readily obtainable. The reactions of [Pt(OC6H4CO)L2] with HCl afford trans-[PtCl(OHC6H4CO)L2], L monodentate tertiary phosphine and cis-[PtCl(OHC6H4CO)L2], L2 1,2-bis-diphenylphosphinoethane, in which the metal—carbon bond remains intact. The structure of [Pt(OC6H4CO)-(P(p-CH3C6H4)3)2] has been determined by X-ray diffraction methods and found to have the expected square planar structure. Some relevant bond lengths and angles are: PtP; 2.271(4) and 2.348(5) Å; PtC; 1.96(2) Å and PtO; 2.07(1) Å; PPtP 101°, CPtO 82°. 相似文献
10.
Dimethylamine reacts with Ru3(CO)12 to produce the η2-hydrido-η-formamido cluster complex HRu(OCN(CH3)2)(CO)10 (I). This formulation is consistent with spectroscopic features such as the absence of v(NH) in the infrared, the presence in the Raman of v(RuHRu) at 1400 cm?1 (v(RuDRu) at 990 cm?1) and indication in the 1H NMR of diastereotopic methyl groups bonded to the nitrogen atom. Since these data could not lead to an unequivocal structure assignment a single crystal X-ray study at 115 K was undertaken. The complex crystallizes in the triclinic space group, P with cell dimensions; a 7.299(33) », b 9.5037(40) », c 13.7454(57) », α 91.876(34)°, β 96.387(34)°, γ 95.341(34)° and Z = 2. The structure was solved by a combination of Patterson and Fourier techniques and refined by full matrix least squares to a final R = 0.054 and Rω = 0.074 for 3074 unique reflections. The three ruthenium atoms define a triangle of unequal sides with both the hydride and formamido groups bridging the longest edge; the formamido group is coordinated through the carbon and oxygen atoms. The edge of the ruthenium triangle bridged both by the hydrogen atom and the formamido group is 2.8755(15) »; the other two edges of the ruthenium triangle are observed to be 2.8319(15) and 2.8577(14) », respectively. In the formamido group the distance CO 1.287(9) » and CN 1.340(10) » reflect partial double bond charater in each bond consistent with observation of two chemically distinct methyl groups on the dinitrogen atom. The hydrogen atom bridging one edge of the ruthenium triangle is asymmetrically positioned at 1.73(9) » from the ruthenium atom bonded to the oxygen atom and 1.91(9) » from the ruthenium atom bonded to the carbon atom of the carboxamido group. 相似文献
11.
Yu.V. Skripkin A.A. Pasynskii V.T. Kalinnikov M.A. Porai-Koshits L.Kh. Minacheva A.S. Antsyshkina V.N. Ostrikova 《Journal of organometallic chemistry》1982,231(3):205-217
The heteronuclear Cp2Nb(CO)(μ-CO)Mn(CO)4 (I), Cp2Nb(CO)(μ-H)Ni(CO)3 (II) and [Cp2Nb(CO)(μ-H)]2M(CO)4 (III, M = Mo;IV, M = W) complexes were prepared by reaction of Cp2NbBH4/Et3N with Mn2(CO)10 in refluxing toluene, direct reaction of Cp2NbBH4 with Ni(CO)4 in ether, and reaction of Cp2NbBH4/Et3N with M(CO)5. THF complexes (M = Mo or W) in THF/benzene mixture. An X-ray investigation of compounds I–III was performed. It is established that in I the bonding between Mn(CO)5 and Cp2Nb(CO) (with the angle (α) between the ring planes being 44.2(5)°) fragments takes place via a direct NbMn bond (3.176(1) Å) and a highly asymmetric carbonyl bridge (MnCco 1.837(5) Å, NbCco 2.781(5) Å). On the other hand, in complex II the sandwich Cp2Nb(CO)H molecule (angle α = 37.8°) is combined with the Ni(CO)3 group generally via a hydride bridge (NbH 1.83 Å, NiH 1.68 Å, NbHNi angle 132.7°) whereas the large Nb?Ni distance, 3.218(1) Å, shows the weakening or even absence of the direct NbNi bond. Similarly, in complex III two Cp2Nb(CO)H molecules (with α angles equal to 41.4 and 43.0°, respectively) are joined to the Mo(CO)4 group via the hydride bridges (NbH 1.83 and 1.75 Å and MoH 2.04 and 2.06 Å) producing a cis-form. The direct NbMo bonds are probably absent, since the Nb?Mo distances are rather long (3.579 and 3.565 Å). The effect of electronic and steric factors on the structure of heteronuclear niobocene carbonyl derivatives is discussed. 相似文献
12.
Fujico Iwasaki Martin J. Mays Paul R. Raithby Philip L. Taylor Peter J. Wheatley 《Journal of organometallic chemistry》1981,213(1):185-206
Twelve new trinuclear complexes containing terminal PH2Ph, edge-bridging PHPh and/or capping PPh ligands have been isolated from the reaction of M3(CO)12 (M = Ru or Os) with PH2Ph in refluxing solvents. HRu3(CO)10(PHPh) (IIIa) crystallises in the monoclinic space group P21/c with a = 8.761(3), b = 11.402(4), c = 22.041(7) Å,β = 98.89(2)°, and Z = 4. The structure was solved by a combination of direct methods and Fourier difference techniques, and refined by blocked-cascade least squares to R = 0.027 for 3676 unique observed intensities. The X-ray analysis shows that one edge of the Ru3 triangle is bridged by a hydride and the PHPh ligand, and that the phosphorus-bound hydrogen atom lies over the metal triangle and the phenyl group away from it. This provides an explanation for the ready formation of the capped species H2Ru3(CO)9(PPh) (Va) on pyrolysis of the edge-bridged complex as opposed to the previously reported conversion of HOs3(CO)10(NHPh) to an orthometallated derivative under similar conditions. An X-ray analysis of H2Ru3(CO)9-(PPh) (Va) confirms the capped geometry. the complex crystallises in the monoclinic space group P21/n with a = 9.323(4), b = 15.110(6), c = 45.267(15) Å,β = 91.84(3)°, and Z = 12. the structure was solved and refined using the same techniques as described previously. The final residual R is 0.061 for 4839 reflections. Some reactions of Va show that the phosphorous cap is difficult to displace and stabilises the molecule with respect to decomposition to non-cluster species. 相似文献
13.
Michael Laing Magriet J. Nolte Eric Singleton Erwin van der Stok 《Journal of organometallic chemistry》1978,146(1):77-86
The crystal structure of [(C8H12)6H3Me)(OC6H4Me)2} {P(OCH2)3CMe}] has been determined. a 18.32, b 18.98, c 9.35 Å, U 3251 Å3, Pn21a, Z = 4, R = 0.048, 2541 observed data.The coordination about the iridium atom is distorted trigonal bipyramidal; the two phosphorus atoms are equatorial, the σ-bonded carbon is axial, and the bidentate cyclooctadiene is bonded axialequatorial. The IrC(axial) bonds are longer than the IrC(equatorial) bonds: 2.22, 2.26; 2.17, 2.19 Å. The IrC(σ) bond length is 2.19 Å, not significantly different from the formally π-bonded C to Ir distances. The IrP lengths of 2.201 and 2.240 Å and the PIrP angle of 108.7° are normal. The longer IrP bond is in the five-membered chelate ring. The inertness to substitution is discussed. 相似文献
14.
Hydrocarbon solutions of Mo2(O—t-Bu)6 and PF3 (2 equiv) yield Mo4F4(O—t-Bu)8, I, and PF2(O—t-Bu). Compound I contains a bisphenoid of molybdenum atoms with two short MoMo distances, 2.26 Å, and four long MoMo distances, 3.75 Å, corresponding to localized MoMo triple bonding and non-bonding distances, respectively. The tetranuclear compound may be viewed as a dimer, [Mo2(μ2-F)2(O-t-Bu)4]2, and addition of PMe3 to hydrocarbon solutions of I yields Mo2F2(O—t-Bu)4(PMe3)2, II, which contains an unbridged MoMo triple bond of distance 2.27 Å. Each molybdenum atom is coordinated to two oxygen atoms, one fluorine atom and the phosphorus atom of the PMe3 ligand in a roughly square planar manner. The overall central Mo2O4F2P2 skeleton has C2 symmetry and NMR studies (1H, 19F and 31P) are consistent with the maintenance of this type of structure in solution. Infrared and electronic absorption spectral data are reported. These are the first compounds containing fluorine ligands attached to the (MoMo)6+ unit. 相似文献
15.
M. Pilar Gómez-Sal Brian F.G. Johnson Jack Lewis Paul R. Raithby S.N.Azman B. Syed-Mustaffa 《Journal of organometallic chemistry》1984,272(1):C21-C24
The neutral mixed-metal cluster [Ru3(NO)(CO)10]2Hg has been prepared by the reaction of the [Ru3(NO)(CO)10], with HgCl2. An X-ray crystal structure shows that the mercury atom links two Ru3 triangular units by bridging an RuRu edge of each unit. The dihedral angle between the two Ru2Hg triangles is 27.6°. In each Ru3 triangle a nitrosyl ligand bridges the same RuRu edge as the bridging Hg atom while the ten carbonyl groups are all terminal. 相似文献
16.
The crystal and molecular structure of hexaphenylditin selenide (C6H5)3SnSeSn(G6H5)3 was determined by X-ray diffraction data and was refined to R 0.055. The compound is monoclinic, space group P21, with a 9.950(4), b 18.650(7), c 18.066(6) Å, β 106.81(4)°, Z 4. The two molecules in the asymmetric unit differ slightly in their conformations, both having approximate C2 symmetry. Bond lengths and angles are: SnSe 2.526 (2.521(3) ? 2.538(3)) Å; SnC 2.138 (2.107(16)?2.168(19)) Å; SnSeSn 103.4(1)°, 105.2(1)°. There are only slight angular distortions at the SnSeC3 tetrahedra (SeSnC angles: 104.3(5)?114.8(4)°). The bond data indicate essentially single bonds around the Sn atoms. 相似文献
17.
Leonard E. Bogan David A. Lesch Thomas B. Rauchfuss 《Journal of organometallic chemistry》1983,250(1):429-438
Fe3Te2(CO)9 is shown to be a useful precursor to a variety of heterometallic carbonyl clusters in reactions which appear to proceed via the intermediacy of Fe2(Te2)(CO)6. Fe3Te2(CO)9 decomposed in polar solvents to give Fe2(Te2)(CO)6 which could be dimerized to Fe4Te4(CO)12. Fe3Te2(CO)9 reacted with C5H5Co(CO)2 and Pt(C2H4)(PPh3)2 to give good yields of (C5H5CO)Fe2Te2(CO)7 and Fe2PtTe2(CO)6(PPh3)2, respectively. (C5H5Co)Fe2Te2(CO)7 underwent reversible decarbonylation to give a mixture of two isomers of (C5H5Co)Fe2Te2(CO)6 as established by 125Te NMR spectroscopy. Upon reaction with Co2(CO)8, Fe3Te2(CO)9 gave Co2FeTe(CO)9 or Co4Te2(CO)11 depending on the reaction conditions. Co4Te2(CO)11, like Fe3Te2(CO)10 and (C5H5Co)Fe2Te2(CO)7, can be reversibly decarbonylated. The assembly of Co2FeTe(CO)9 may be mechanistically related to the conversion of Fe2(S2)(CO)6 to FeCo2S(CO)9 which was found to proceed via Co2Fe2S2(CO)11. Alternatively, Co2Fe2S2(CO)11 reacted photochemically with [C5H5Mo(CO)3]2 to give the known, chiral cluster (C5H5Mo)CoFeS(CO)8. While Fe2(Te2)(CO)6 thermally dimerized to Fe4Te4(CO)12, Fe2(S2)(CO)6 gave the analogous dimer only upon photolysis. In contrast to the stability of (C5H5CO)Fe2Te2(CO)7, the reaction of C5H5Co(CO)2 with Fe2(S2)(CO)6 gave only (C5H5CO)Fe2S2(CO)6 which is proposed to be structurally related to Fe3S2(CO)9 and not (C5H5Co)3S2 or Fe2PtS2(CO)6(PPh3)2. 相似文献
18.
Giuliana Gervasio Domenica Marabello Enrico Sappa Andrea Secco 《Journal of Cluster Science》2007,18(1):67-85
Ru3(CO)12 has been reacted with the compounds hex-1-en-3-yne [EtC≡CCH=CH2], 2-methyl-hex-1-en-3-yne [EtC≡CC(=CH2)CH3] and with 3(ethoxy-silyl)propyl isocyanate [(EtO)3Si(CH2)3NCO] and the compound tb [(EtO)3Si(CH2)3NHC(=O)OCH2C≡CCH2OC(=O)NH(CH2)3Si(OEt)3] in hydrocarbon solution. Some reactions in CH3OH/KOH solution (followed by acidification) have also been performed.
The main products of the reactions with ene-ynes are the clusters Ru3(CO)6(μ-CO)2L2 (L = C6H8, C7H10) and their demolition products, the “ferrole” Ru2(CO)6L2 complexes. One of the isomers of Ru3(CO)6(μ-CO)2L2, and Ru2(CO)6L2 (L = C7H10) have been reacted with vinyl-triethoxysilane [(EtO)3SiCH=CH2]: these reactions did not afford complexes containing new carbon–carbon bonds or triethoxy-silyl groups. Only polymerization
of vinyl-triethoxysilane occurred.
The reactions of Ru3(CO)12 with triethoxysilyl-propyl-isocyanate and tb (in the presence of Me3NO) lead to the same products, that is the isomeric complexes (μ-H)Ru3(CO)9[C=N(H)(CH2)3Si(OEt)3] with a “perpendicular” ligand (complex 3, as proposed on the basis of spectroscopic results) and (μ-H)Ru3(CO)9[HC=N(CH2)3Si(OEt)3] with a “parallel” ligand (complex 4, as confirmed by a X-ray analysis). The reaction pathways leading to these products are discussed. Complex 4 has been reacted with tetraethyl orthosilicate and the resulting material has been characterized. These reactions are part
of a study on the synthesis of inorganic-organometallic materials through sol–gel techniques.
This paper is dedicated to Prof. Gunther Schmid in the occasion of his 70th birthday. 相似文献
19.
Thermolysis or Me3NO activation of the hexaruthenium cluster Ru6(μ6-C)(CO)17 in the presence of the diphosphine ligand 1,2-bis(diphenylphosphino)benzene (dppbz) does not furnish the expected dppbz-substituted cluster Ru6(μ6-C)(CO)15(dppbz) but rather HRu6(μ5-C)(μ3-P)(CO)14(dppbz), whose edge-bridged square-pyramidal structure has been established by X-ray crystallography. Accompanying the opening of the original closo Ru6 polyhedron is the dephosphination of a second dppbz ligand through three rapid P-C bond cleavages, leading to the capture of the phosphorus atom as a face-capping phosphido ligand. This unprecedented reactivity between Ru6(μ6-C)(CO)17 and the dppbz ligand is discussed relative to other diphosphine ligands. 相似文献
20.
Corry Decker 《Journal of organometallic chemistry》2004,689(9):1691-1701
The reactions of [Fe3(CO)12] or [Ru3(CO)12] with RNC (R=Ph, C6H4OMe-p or CH2SO2C6H4Me-p) have been investigated using electrospray mass spectrometry. Species arising from substitution of up to six ligands were detected for [Fe3(CO)12], but the higher-substituted compounds were too unstable to be isolated. The crystal structure of [Fe3(CO)10(CNPh)2] was determined at 150 and 298 K to show that both isonitrile ligands were trans to each other on the same Fe atom. For [Ru3(CO)12] substitution of up to three COs was found, together with the formation of higher-nuclearity clusters. [Ru4(CO)11(CNPh)3] was structurally characterised and has a spiked-triangular Ru4 core with two of the CNPh ligands coordinated in an unusual μ3-η2 mode. 相似文献