The synthesis and physical properties of dineophyl(-)menthyltin (4) and methylneophyl (-)menthyltin (9) hydrides as well as that of their organotin precursors are described. Whereas the reduction of acetophenone with 4 afforded (-)-(S)-1-phenylethanol in 40% ee, the reduction of the same ketone with dimethyl(-)menthyltin hydride yielded the alcohol with only a 7% ee. Full H-1,C-13, and Sn-119 NMR data are given.