In addition to C(sp 3 )-C(sp 3 ) bond formation, CdS QD gels also catalyzed C(sp 2 )-C(sp 3 ) bond formation using aldehydes as the C-H partner. A broad scope of structurally diverse aldehydes, including aromatic (3n -3w) and aliphatic (3x, 3y) ones, were used for the hydroacylation of 1 in good to excellent isolated yields of 60 -90%. We observed faster reactions with aliphatic aldehyde reactions than the aromatic ones (~3 hours vs ~15 hours). This reaction exhibited excellent tolerance towards various functional groups, including halogen, cyano, t-butyl, etc.