Heavy ketones silicon-containing

We look forward to the addition of other chromophores substituted with heavy atoms to the short list compiled in this work. The preparation of gas phase telluro-ketones appears imminent. A variety of silicon substituted compounds have been reported including silanones (RR Si=0), silanethiones (RR Si=S), silaisonitriles (RNSi), silenes (R R"Si=CRjRj) and others. Phosphorus compounds such as phosphaallenes (RC=P=X), phosphaalkenes (RR C=PR") and diphosphenes (RP=PR ) have been synthesized by a number of groups A few compounds containing As, Sb, Bi, and Ge atoms have also been reported We are confident that many of these new species will have properties which are sufficiently at variance with those of conventional organic chromophores to make spectroscopic studies both novel and rewarding. 

---