DETERMINATION OF THE FIRST MOLECULAR HYPERPOLARIZABILITY, BETA, OF SOME ORGANOMERCURY COMPOUNDS BY SOLVATOCHROMISM

Twelve arylmercuric nitrophenylacetylides, GRAPHICS (where D=I,Br,Cl ,MeO,EtO, Me,H2N,MeHN,Me(2)N or O2N; R(1)=H or Me; R(2)=H or Me), have been synthesised, and their beta, the first molecular hyperpolarizabi lity, have been examined by solvatochromism to be in the order of 10(- 29) esu while the lambda(max) in the electronic spectra are around 310 nm. These linear organomercury molecules may represent a new approach to solve the conflict between increasing nonlinearity and improving tr ansparency.