Synthesis and properties of bifunctional oligoethers. I. Chiral oligomers from propylene oxide

Abstract

Racemic or chiral bifunctional oligoethers of the type H—(O—CH(CH₃)—CH₂—)_n—Cl, n = 4-10, have been prepared by reacting racemic or optically active propylene oxide with teiraphenyl porphyrin (TPPH₂)—AlEt₂Cl initiator sysfem. The synthesized products were characterized by IR, elemental analysis, VPO, GPC, and ¹H and ¹³CNMR techniques. The oligomers purified by fractional distillation exhibit narrow MW distributions (M̄_w/M̄_n ≈ 1.03). Chiroptical properties of the oligomers and their derivatives were examined and compared with those of high molecular weight polyfpropylene oxide). Different possibilities of applicadons of these oligomers are presently under study.