NEW MATERIAL: A compd. represented by formula I [R1 and R2 are each 1-4C alkyl, phenyl or benzyl, a is 0-2, R3 (OH substd.) 1-12C alkylene or phenylene, X is -O-, -S- or -NR6 (R6 is H, 1-4C alkyl or -CO-R5-OH), b is 0-6, R4 is (OH substd.) 1-12C alkylene, Y is -O-, -S-, or -NR7 (R7 is H or 1-4C alkyl, R5 is a divalent radical, diminished by the -CO-O group, of a lactone having a total of 4-7 ring members and containing at least one chiral carbon and corresponding predominantly to an optically active enantiomeric form and e is 1-10].

USE: A packing material as stationary phases for the chromatographic separation of chiral compds.

PREPARATION: 1 mol of a compd. represented by formula II is reacted with 1 mol of a compd. represented by formula III.