Add time:07/20/2019         Source:sciencedirect.com

Static conformations and the dynamic behavior of the radicals (MCH2)2ĊX (where M = SiR3, GeR3, or SnR3); X = H, CH3, or OSiMe3) have been investigated by ESR. At the preferred conformation, the two metal groups almost eclipse the singly-occupied carbon p-orbital and are located on the opposite sides of the CH2CXCH2 plane. The barriers for the flip-flop motion, evaluated by the line-shape analysis of the temperature-dependent ESR spectra, are closely related to those for the metal-group rotation about the C(α)C(β) bond.

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