Table 2. Evaluation of Different Catalysts for the One-Pot Hydrosilylation of Styrene with PhSiH₃ Coupled with Catalytic Dehydrogenative Coupling of PhSiH₃ with Methanol^a.

entry	catalystb	conv. (%)b	A (%)	B (%)	C (%)	D (%)	E (%)	F (%)
1	[Co(OAc)(H2O)2(tpy)]OAc (cat-1)c	>99				5		95
2	Co(OAc)2·4H2O	>99			>99
3	Co(acac)2·H2O	>99			>99
4	Co(NO3)2·6H2O	33		14.3	18.7
5	Fe(OAc)2 + tpy	>99			>99
6	Fe(OAc)2·9H2O	>99			>99
7	Ni(OAc)2 + tpy	>99	4.4	26.3	51.8		17.5
8	Ni(OAc)2·4H2O	>99		41.4	36		22.6
9	tpy	0
10	Karstedt catalystd	>99			34	66

^aAll reactions were performed with 0.89 mmol of phenylsilane, 0.89 mmol of styrene, and 0.1% of catalyst in 0.2 mL of methanol under aerobic conditions.

^bDisappearance of phenylsilane determined by ¹H-NMR analysis of the crude reaction mixture using 1,4-dinitrobenzene as the standard.

^c6 h of reaction time.

^dPt₂[(Me₂SiCH=CH₂)₂O]₃.