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The synthesis and characterization of a family of novel alkaline earth metal stannides, in addition to tri- and pentastannanes are described. [Ba(18-crown-6)(HMPA)2][SnPh3]2 (4), [Ca(18-crown-6)(HMPA)2][Sn(SnPh3)3]2 (5), and [Sr(18-crown-6)(HMPA)2][Sn(SnPh3)3]2 (6) were synthesized by insertion of the corresponding alkaline earth metals into the tintin bond of hexaphenyldistannane. Ph3SnSnPh2SnPh3 (7), and Sn(SnPh3)4 (8) became available by treating 4 with diphenyldichlorostannane. All compounds were studied by NMR spectroscopy, and X-ray crystallography. The stannanes 7 and 8 were also characterized by elemental analysis.
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Englich et al. (2000) studied this question.
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