STRUCTURE AND SOME PROPERTIES OF (ALKOXO)(SUBPHTHALOCYANINATO)BORON(III)

A few (alkoxo)(subphthalocyaninato)boron(III) complexes, [BX(subpc)] ( X=OMe, OEt, OBu(t), and OPh), were prepared and characterized. The mol ecular structure of [B(OEt)(subpc)] was determined by an X-ray structu re analysis; the boron atom is situated 0.642 Angstrom upward from the triangle plane of three isoindoline nitrogen atoms. The geometry of t he boron atom is distorted tetrahedral, and the complex shows a wine-g lass shape. The mass spectra showed that a part of the hydrogen atoms of the subphthalocyanine ring are displaced by the halogen atoms of bo ron trihalide or solvents. The complexes showed strong absorption band s at around 560 (Q band) and 300 nm (B band) in chloroform, respective ly. The complexes decomposed in solution under irradiation with visibl e light. The first oxidative or reductive half-wave potential of [B(OE t)(subpc)] was observed at 1.06 V (vs. SCE) or -1.11 V, respectively.