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The changes in NMR chemical shifts between TMS 3 CLi versus TMS 3 CH and TMS 3 SiLi versus TMS 3 SiH show that the electronic structures of the two lithiated compounds are vastly different, thereby prohibiting the successful pyrolytic decomposition of TMS 3 CLi to TMS 2 CLi 2 . The moiety to be transferred in the Ziegler pyrolysis reaction must...