Preparation of organosilicon compounds with aldehyde functionality

A reaction product prepared by a process comprising:

• 1) combining, under conditions to catalyze hydroformylation reaction, starting materials comprising
• (A) a gas comprising hydrogen and carbon monoxide,
• (B) an alkenyl-functional organosilicon compound, and
• (C) a rhodium/bisphosphite ligand complex catalyst, where the bisphosphite ligand has formula
• where
• R6 and R6′ are each independently selected from the group consisting of hydrogen, an alkyl group of 1 to 20 carbon atoms, a cyano group, a halogen group, and an alkoxy group of 1 to 20 carbon atoms;
• R7 and R7′ are each independently selected from the group consisting of an alkyl group of 3 to 20 carbon atoms, and a group of formula —SiR173, where each R17 is an independently selected monovalent hydrocarbon group of 1 to 20 carbon atoms;
• R8, R8′, R9, and R9′ are each independently selected from the group consisting of hydrogen, an alkyl group, a cyano group, a halogen group, and an alkoxy group, and
• R10 R10′, R11, and R11′ are each independently selected from the group consisting of hydrogen or and alkyl group;
• wherein the reaction product comprises
• the aldehyde-functional organosilicon compound, wherein
• the aldehyde-functional organosilicon compound has, per molecule, at least one aldehyde-functional group covalently bonded to silicon, wherein
• the aldehyde-functional group has formula
• where
• G is a divalent hydrocarbon group free of aliphatic unsaturation that has 2 to 8 carbon atoms;
• and
• the rhodium/bisphosphite ligand complex catalyst;
• and wherein the aldehyde-functional organosilicon compound comprises
• a) a first organosilicon compound comprising a linear aldehyde-functional moiety, and
• b) a second organosilicon compound comprising a branched aldehyde-functional moiety;
• wherein
• a molar ratio of the linear aldehyde-functional moiety/the branched aldehyde-functional moiety (N/I ratio)>6.