The crystal structure of (C6H5)3SnCH2C(CH3)CH2 has been determined. The asymmetric unit consists of two molecules of 2-methylallyltriphenyltin. The compound crystallizes in the orthorhombic space group Pbca with a 31.232(12). b 20.890(9), and c 11.835(7) Å. The molecular geometry is controlled by σ(CSn)-π orbital mixing and by hyperconjugative stablization involving the σ orbitals of CH bonds. Any pπdσ bonding between the metal and the allyl double bond, or inductive effects in the allyl group are shown to be unimportant. The structural parameters are analyzed and compared with those of various methylated derivatives of triphenyllalyltin
ALLYLLIKE-TIN AND ALLYLLIKE-TIN DERIVATIVES .4. THE CRYSTAL-STRUCTURE OF 2-METHYLALLYLTRIPHENYLTIN - A COMPARISON WITH OTHER METHYL-SUBSTITUTED DERIVATIVES OF ALLYLTRIPHENYLTIN
MARTON, DANIELE;TAGLIAVINI, GIUSEPPE;
1989
Abstract
The crystal structure of (C6H5)3SnCH2C(CH3)CH2 has been determined. The asymmetric unit consists of two molecules of 2-methylallyltriphenyltin. The compound crystallizes in the orthorhombic space group Pbca with a 31.232(12). b 20.890(9), and c 11.835(7) Å. The molecular geometry is controlled by σ(CSn)-π orbital mixing and by hyperconjugative stablization involving the σ orbitals of CH bonds. Any pπdσ bonding between the metal and the allyl double bond, or inductive effects in the allyl group are shown to be unimportant. The structural parameters are analyzed and compared with those of various methylated derivatives of triphenyllalyltin
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