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The reactions of SnCl2, PbCl2, or GeCl2, dioxan with LiNR12, OEt2 or LiNR1R2, OEt2 in Et2O at 0° yield the stable, monomeric, diamagnetic, coloured, volatile, hydrocarbon-soluble title compounds which are highly reactive.
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Harris et al. (1974) studied this question.
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