Controlling the Singlet−Triplet Splitting in Bisverdazyl Diradicals: Steps toward Magnetic Polymers
Inorganic Chemistry1999Vol. 38(13), pp. 3061–3065
Citations Over TimeTop 17% of 1999 papers
Abstract
Density functional calculations were performed on 1,1‘,5,5‘-tetramethyl-6,6‘-dioxo-3,3‘-biverdazyl diradical (BVD) and BVD[CuI(PL3)]2 complexes (L = H, Me, OH, OMe, F) in order to investigate how Cu chelation affects the singlet−triplet splitting of the verdazyl system. It was found that donating ligands on Cu destabilize the singlet ground state. Size was also found to play a role, as smaller ligands allow for closer Cu−verdazyl contacts. Although a triplet ground state was not obtained for any of the molecules examined, a very small splitting of 40 cm-1 was calculated for the phosphine complex.
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