Abstract: 77Se chemical shifts and 1H-77Se and 77Se-77Se coupling constants Denmark, DK-2800 for a series of substituted tetraselenafulvalenes (TSFs). For mixtures of cis and trans isomers resolved signals for each isomer were observed at 21 kG. The &/trans assignments were obtained by measurement of the homonuclear 3J selenium-77 coupling constant. This coupling constant is related to dihedral bond angles; large coupling ...
