A11 starting materials were purchased from Aldrich Chemical Co. Melting points are uncorrected.'H and NMR spectra were recorded on a Bruker AC 250 MHz spectrometer. 5, 5- bis (4-Cyano-2-oxabutyl)-1, 9-dicyano-3, 7-dioxanonane (l).-(Caution: Acrylonitrile is ...