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Silylmethyl and related complexes II. Preparation, spectra, and thermolysis of the tetraneopentyls of titanium, zirconium, and hafnium

Authors
Journal
Journal of Organometallic Chemistry
0022-328X
Publisher
Elsevier
Publication Date
Volume
57
Issue
2
Identifiers
DOI: 10.1016/s0022-328x(00)86607-3

Abstract

Abstract The preparation and characterisation of the Group IVA neopentyls (Me 3CCH 2) 4M (M = Ti, Zr, or Hf) is described. Spectroscopic data (IR, Raman, mass, 1H NMR, and PE) are provided; IR and Raman bands have been assigned by comparison with results on Group IVB analogues (M = Ge or Sn). MC 4 stretching vibrations fall in the range 540–485 cm −1, and bending modes at 240–283 cm −1. Thermal decomposition gives neopentane as the sole detectable product; qualitatively, stability increases in the order M = Ti < Zr < Hf and for R 4M : R = Me ⪡ Me 3CCH 2 ≈ Me 3SiCH 2. (Me 3CCH 2) 4Ti is aerobically oxidised in benzene to give (Me 3CCH 2O) 4Ti

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