Abstract

Crystals of the silazoxane, [(Me 2Si) 2ONC 6F 5] 2 are triclinic with a 8.703(4), b 14.334(6), c 13.021(6) Å, α 102.05(3), β 107.43(4) and γ 105.83(4)°, space group P 1 , Z = 2. The asymmetric unit consists of two half molecules, each of which lies on a centre of symmetry. Each of the rings has a chair conformation with mean Si—N and Si—O distances of 1.747 and 1.623 Å respectively; the endocyclic angles at the silicon atoms in the asymmetric unit are different (mean values 109.6 and 106.3°) and the ring angles at oxygen and nitrogen have mean values of 147.7 and 123.2° respectively.

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