INFRARED-SPECTRUM OF DIVINYL TELLURIDE AND THEORETICAL-ANALYSIS OF DIVINYL GROUP-VI COMPOUNDS

The infrared spectrum of divinyl telluride (DVT) has been studied for the gaseous, liquid and solid phases as well as in inert matrices at l ow temperatures. HF-SCF calculations (using triple-zeta quality basis sets) have been carried out on DVT and on the oxygen, sulfur and selen ium analogs. In each instance the calculations predict two relatively stable conformations, with the cis/trans form being the more stable fo r divinyl ether and a near-planar trans/trans form being the more stab le for the other three compounds. The infrared spectrum of DVT is cons istent with the presence of two rotameric forms of the molecule, and a ssignments of many of the absorptions are made to normal modes.