Carbene complexes

Hitchcock, Peter B.; Läppert, Michael F.; Thomas, S. A.; Thorne, Andrew J.; Carty, Arthur J.; Taylor, Nicholas J.

doi:10.1016/0022-328x(86)80408-9

Cited by 82 publications

(40 citation statements)

References 27 publications

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“…The complexes are yellow (1,4,6) or red (2, 3, 5, 7) crystal- www.chemeurj.org line solids and are readily soluble in common organic solvents such as toluene, dichloromethane and THF, but poorly soluble in n-hexane. Complex 8 is a deep-red crystalline solid that is only poorly soluble in toluene but readily soluble in dichloromethane.…”

Section: Resultsmentioning

confidence: 99%

Insights into the Intramolecular Donor Stabilisation of Organostannylene Palladium and Platinum Complexes: Syntheses, Structures and DFT Calculations

Wagner

Deáky

Dietz

et al. 2013

Chemistry A European J

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The syntheses of the transition metal complexes cis-[(4-tBu-2,6-{P(O)(OiPr)2}2C6H2SnCl)2MX2] (1, M = Pd, X = Cl; 2, M = Pd, X = Br; 3, M = Pd, X = I; 4, M = Pt, X = Cl), cis-[{2,6-(Me2NCH2)2C6H3SnCl}2MX2] (5, M = Pd, X = I; 6, M = Pt, X = Cl), trans-[{2,6-(Me2NCH2)2C6H3SnI}2PtI2] (7) and trans-[(4-tBu-2,6-{P(O)(OiPr)2}2C6H2SnCl)PdI2]2 (8) are reported. Also reported is the serendipitous formation of the unprecedented complexes trans-[(4-tBu-2,6-{P(O)(OiPr)2}2C6H2SnCl)2Pt(SnCl3)2] (10) and [(4-tBu-2,6-{P(O)(OiPr)2}2C6H2SnCl)3Pt(SnCl3)2] (11). The compounds were characterised by elemental analyses, (1)H, (13)C, (31)P, (119)Sn and (195)Pt NMR spectroscopy, single-crystal X-ray diffraction analysis, UV/Vis spectroscopy and, in the cases of compounds 1, 3 and 4, also by Mössbauer spectroscopy. All the compounds show the tin atoms in a distorted trigonal-bipyramidal environment. The Mössbauer spectra suggest the tin atoms to be present in the oxidation state III. The kinetic lability of the complexes was studied by redistribution reactions between compounds 1 and 3 as well as between 1 and cis-[{2,6-(Me2 NCH2)2C6H3SnCl}2PdCl2]. DFT calculations provided insights into both the bonding situation of the compounds and the energy difference between the cis and trans isomers. The latter is influenced by the donor strength of the pincer-type ligands.

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Section: Resultsmentioning

confidence: 99%

Insights into the Intramolecular Donor Stabilisation of Organostannylene Palladium and Platinum Complexes: Syntheses, Structures and DFT Calculations

Wagner

Deáky

Dietz

et al. 2013

Chemistry A European J

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“…23 From our literature search 24 we retrieved the germylene complex (2,6-tBu 2 -4-Me-C 6 H 2 O) 2 GeFe(CO) 4 as the only respective example with a trigonal planar-coordinate germanium center. 25 The Fe1-Ge1 bond length in 3 was determined to be 2.3026(5) Å [2.3041(5) Å] which is longer than that reported for (2,6-tBu 2 -4-Me-C 6 H 2 O) 2 GeFe(CO) 4 (2.240(2) Å) 25 but does not exceed the range found for the majority of related iron carbonyls (germylene-iron complexes: 2.298(2)-2.348(1) Å; ferrogermylenes: 2.4415(11) Å, 2.496(2) Å). 22,23 Interestingly, the Ge-N imine distance in 3 (Ge1-N1 = 1.755 (2) Å [1.752(2) Å]) is considerably decreased in comparison with those in Rivard's bis(imino)germylene IV (1.8194(15) Å) 15 and approaches the typical GevN bond lengths in germaimines (1.691(3)-1.704(5) Å).…”

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confidence: 99%

Isolation of a germanium(ii) cation and a germylene iron carbonyl complex utilizing an imidazolin-2-iminato ligand

Ochiai

Franz

et al. 2015

Dalton Trans.

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“…The Sn-O bond distances are not equal, differing by 8.2 pm in the case shown [109] and much larger at 30.7 pm in the other [110]. The stereochemistry about tin includes trigonal-planar [111,119], pseudo-tetrahedral [112][113][114]117,[120][121][122][123][124][125][126][127][128][129], trigonal-bipyramidal [115], squarepyramidal [116] and seven-coordinate [118]. 8(9) pm in the former and 210.0(9) pm in the latter.…”

Section: Figure 2 Structure Of [Chbusn^-v-s2cpcy 3 )([I-cimo(co)2(pcmentioning

confidence: 90%

“…Here the bridge is seen to be CO2 molecule bridging in a μ-η -CO2 fashion by both Ο atoms to Sn an the C atom to Re. Of these the most common is iron for which thirty one derivatives are listed , Twenty two of the structures reveal that the tin and iron are directly bonded with Sn-Fe bond distances ranging from 240.8(1) pm [111] to 262.43 (21) pm [128], with an average value of 253.4 pm. Also, the metallocyclic ring (-SnOCO-) in the former is about 1° more open than in the latter, and the Re-C bond distance is 205.…”

Section: Figure 2 Structure Of [Chbusn^-v-s2cpcy 3 )([I-cimo(co)2(pcmentioning

confidence: 99%

“…Also, the metallocyclic ring (-SnOCO-) in the former is about 1° more open than in the latter, and the Re-C bond distance is 205. The iron centre can be found five-coordinate [111,116,126], six [125,127] and seven-coordinate [117,118,128], but the most prevalent is semi-sandwiched with two additional monodentate ligands [112][113][114][115][119][120][121][122][123][124]129]. There are almost one hundred Group VIII metals found in combination with tin in binuclear complexes.…”

Section: Figure 2 Structure Of [Chbusn^-v-s2cpcy 3 )([I-cimo(co)2(pcmentioning

confidence: 99%

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Heterometallic Tin Compounds: Classification and Analysis of Crystallographic and Structural Data: Part 1. Dimeric Derivatives

Holloway¹,

Melnı́k²

2001

Main Group Metal Chemistry

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This review covers the crystallographic data for dimeric tin compounds with one other metal atom centre, following the pattern of the previous reviews on tin coordination and organometallic compounds. Over two hundred and forty such derivatives have been characterised, twenty three with a non-transition heterometal atom, one with an actinide metal and the rest with a transition metal atom. The predominant geometries of the tin and the heteroatom are discussed along with the relationships between atom size, bond distances and bond angles. The occurrences of direct metal-metal bonds, and examples of isomerism are illustrated CONTENTS 0. ABBREVIATIONS 1. DIMERIC COMPOUNDS 2.1 Α-Group (Non-Transition) MetalsCrystallographic and structural data for some twenty three tin heterometallic compounds with sub-group A. or non-transition metals, are summarised in Table 1. These are listed in their Periodic Group order, with the typical metals of each group first, and then the Sn-M distance. The first eight derivatives contain tin with lithium [6][7][8][9][10][11][12][13], with the tin in the +2 oxidation state and lithium in its usual +1 oxidation state. The shortest Sn-Li bond 136 Brought to you by | Purdue University Libraries Authenticated Download Date | 6/11/15 11:28 PM Main Group Metal Chemistry Vol. 24, Nr. 3, 2001 distance is found in a yellow derivative [6] at 277.6(4) pm. Here, three Ph(Bu')CN ligands bridge the lithium and tin atoms via their Ν atoms, with Sn-N-Li bridge angles of 81,5( 1A slightly longer Sn-Li distance of 278.4(4) pm is found in a cyclometalated dimer [7] leid together by bridging Ο atoms of three 2,6diphenylphenoxide ligands, with mean Sn-O-Li bridge angles of 84.5(2)°.Two crystallographically independent molecules within the asymmetric units of Ph3SnLi(pmdeta) [8] differ essentially by degree of distortion. While the Sn(II) atom is coordinated by three phenyl groups, the Li(I) atom utilises the tridentate pmdeta moiety. Four coordination is accomplished by each metal via a direct Sn-Li bond of 286.1(7) and 288.2(7) pm in the respective distortion isomers. Another colourless derivative [9] also contains two crystallographically independent molecules. A direct Sn-Li bond of 289(4) and 297(5) pm, respectively, hold together the N3Sn and LiCb moieties.A lithium atom in the next derivative [ 10] ties two amido groups together to generate an N-donor arrangement which forms part of the N3Sn pyramid, one corner of which is the Sn(II) atom. The structure of a red derivative [11] involves a {(Me3Si)3}2Sn unit coordinated to a LiCl(thf)3 moiety via a chlorine bridge. The tricoordinated Sn(II) atom is also at one corner of a pyramid. A tricoordinated tin atom is also found in a metallocyclic arrangement [12] of a four membered (Sn-P-Li-P) ring with average Sn-P-Li angles of 89.5(7)°.The Sn centre in a sandwich style complex [13] is attached to two distorted η-cp ligands and the planar Ν atom of a (Me3Si)2N group, as seen in Figure 1. The tin atom has a distorted pyramidal geometry, and the cp(Y) ligand h...

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Carbene complexes

Cited by 82 publications

References 27 publications

Insights into the Intramolecular Donor Stabilisation of Organostannylene Palladium and Platinum Complexes: Syntheses, Structures and DFT Calculations

Insights into the Intramolecular Donor Stabilisation of Organostannylene Palladium and Platinum Complexes: Syntheses, Structures and DFT Calculations

Isolation of a germanium(ii) cation and a germylene iron carbonyl complex utilizing an imidazolin-2-iminato ligand

Heterometallic Tin Compounds: Classification and Analysis of Crystallographic and Structural Data: Part 1. Dimeric Derivatives

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