4 Silylidene,^1A_1,CC3,aug-cc-pVTZ C 0.00000000 0.00000000 -1.10883755 Si 0.00000000 0.00000000 0.60851638 H 0.00000000 0.90452009 -1.70868401 H 0.00000000 -0.90452009 -1.70868401