 yellow powder.  Data for **0b** are as follows. Mp: 000--000 °C. Anal. Calcd for C~00~H~00~K~0~O~00~Si~0~: C, 00.00; H, 0.00. Found: C, 00.00; H, 0.00. ^00^Si NMR (C~0~D~0~, TMS, ppm): −0.00 (*Si*Me~0~); −00.00, −00.00 (*Si*Me~0~); −00.00 (*Si*COAryl); −000.00 (*Si*(SiMe~0~)). ^00^C NMR (C~0~D~0~, TMS, ppm): 000.00 (*C*=O); 00.00 ((−*C*H~0~*C*H~0~O−)~0~); 00.00 (Ad-*C*-CO); 00.00, 00.00 (Ad-*C*H~0~); 00.00 (Ad-*C*H); 0.00 (Si(CH~0~)~0~); 0.00, 0.00, 0.00 (Si(CH~0~)~0~). ^0^H NMR (C~0~D~0~, TMS, ppm): 0.00 (s, 00H, (−C*H*~0~C*H*~0~O−)~0~); 0.00, 0.00, 0.00 (