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The reaction of SiCl4 with bis(trimethylsilyl)carbodiimide in a 1:2 molar ratio followed by annealing at temperatures above 400 or 900°C provides the first crystalline ternary Si-C-N solids, namely silicon dicarbodiimide (SiC2N4) and silicon (carbodiimide)nitride (Si2CN4), in near quantitative yields. The anti-cuprite type structure of SiC2N4 is shown on the right.
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Riedel et al. (1997) studied this question.
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