The configuration of the 3-alkyl substituted 1,2,3-triphenyl-1-propanones is proved through use of pseudocontact shifts using Eu(dpm) 3. The conformation of all isomers, regardless of size of R, is similar ( trans vicinal protons). The relative stability of the two isomers is also independent of R up to R = t-Bu. The conformation and configuration of the hydride reduction products, the alkyl substituted 1,2,3-triphenyl-1-propanols, are elucidated through use of NMR chemical shifts, coupling constants, pseudocontact shifts, and by IR spectra. The starting materials and reduction products (with one exception) have the same conformation at relevant centers, yet the mode of hydride attack is best explained by means of a different conformation in the transition state, in which the LAH approaches over a proton at either asymmetric center.