Syntheses, Structures, and Bonding of Cp2M(ER)2 Compounds (Cp = C5H5; M = Ti, Zr; E = Ga, In; R = C6H3-2,6-(2,4,6-i-Pr3C6H2)2)
Citations Over TimeTop 10% of 2006 papers
Abstract
Sodium or magnesium metal reduction of Cp2MCl2 (Cp = C5H5; M = Zr, Ti) with RECl2 (E = Ga, In; R = C6H3-2,6-(2,4,6-i-Pr3C6H2)2) affords heteronuclear organometallic compounds, Cp2M(ER)2, with new types of group 4−group 13 M−E bonds (Zr−Ga (1), Ti−Ga (2), Zr−In (3), Ti−In (4)). These compounds have been characterized by elemental analyses, 1H and 13C NMR spectroscopy, and single-crystal X-ray diffraction analyses. The structures of 1−4 have V-shaped E−M−E trimetallic linkages with quite short M−E bonds (Zr−Ga, 2.6350(8) Å; Ti−Ga, 2.4921(7) Å; Zr−In, 2.7916(5) Å; Ti−In, 2.6685(8) Å). The transition metal (M = Zr, Ti) centers adopt a pseudo-tetrahedral coordination geometry, while the main group metal (E = Ga, In) atoms reside in a two-coordinate, almost linear environment. Density functional theory (DFT) computations on the model compounds Cp2M(EPh)2 (1Ph−4Ph) suggest significant π-back-bonding from the group 4 metals (Zr, Ti) to the group 13 metals (Ga, In) in these compounds.
Related Papers
- → Xenophilic transition metal clusters(2000)15 cited
- → Crystal Structure of α-VPO5(1973)142 cited
- → Heterobinuclear and heterotrinuclear transition-metal ?-allenyl complexes(1993)27 cited
- → ChemInform Abstract: COMPLEXES CONTAINING HETERONUCLEAR METAL‐METAL BONDS. SOME RECENT ADVANCES 1980‐81. A. COMPOUNDS CONTAINING TWO DIFFERENT TRANSITION METALS (EXCLUDING MIXED‐METAL CLUSTERS)(1983)20 cited
- → Transition Metal-Promoted Reactions of Main Group Species and Main Group-Promoted Reactions of Transition Metal Species(1992)5 cited