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Reaction of [(dcypb)ClRu(μ-Cl)3Ru(dcypb)(N2)] (1) with 4 equiv of the stable silylene 1,3-di-tert-butyl-1,3,2-diazasilol-2-ylidene (SiLN2) yields coordinatively unsaturated RuCl(η3-dcypb)(SiLN2) (2...

The Raman, IR and UV spectra of the silylene ( t BuNCH CHN t Bu)Si: ( 1 ) as well as the Raman spectra of related compounds with tetravalent silicon ( t BuNCH CHN t Bu) 2 Si ( 2 ) and ( t BuNCH CHN t Bu)SiCl 2 ( 3 ) and of the heterocycle ( t BuNCH CHN t Bu)C O ( 4 ) are reported. Comparison of the spectra obtained for 1 – 3 reveals a lowered frequency and greatly enhanced intensity of the Raman band corresponding to the C C stretching vibration in the spectrum of 1 which is in accord with the aromatic character of the silylene.

The synthesis and several reactions of the stable silylene 1 (1,3-di-tert-butyl-2,3-dihydro-1H-1,3,2-diazasilol-2-ylidene) are described. X-ray crystal structures are given for two intermediates in the synthesis of 1, the diimine 7 and its dilithium salt 8, and for a byproduct, the spiro compound 10. 1 reacts with ethanol and water by inserting into the O−H bond, and with iodomethane by insertion into the C−I bond. The silanol from reaction of 1 with water condenses to a disiloxane, 13. From 1 and sulfur and selenium, cyclic compounds containing Si2E2 rings are obtained (E = S or Se). Crystal structures are presented for disiloxane 13 and for the sulfur and selenium cycloadducts, 15 and 17.