SYNTHESIS, CRYSTAL-STRUCTURE, AND MAGNETIC-PROPERTIES OF INDIUM(III) DIPHTHALOCYANINE

New form indium(III) phthalocyanine was obtained by the direct reactio n of InMg alloy with 1,2-dicyanobenzene at 210 degrees C. The InPc(2) is isostructural with SnPc(2); it crystallizes in the orthorhombic sys tem, space group P2(1)2(1)2(1), with unit cell parameters a 10.569(3) Angstrom, b = 50.868(11) Angstrom, c = 8.899(2) Angstrom, V = 4784.1 A ngstrom(3), and Z = 4. The crystal structure was refined to R = 0.0322 , R(w) = 0.0457, and S = 1.11 for 731 refined parameters and 3898 inde pendent reflections having with F > 4 sigma(F). The crystals of InPc(2 ) contain sandwich-type molecules in which the indium atom is 8-fold c oordinated by the isoindole nitrogens of two phthalocyanine rings. The average value of the In-N bond distance is 2.333 Angstrom (2.327(4)-2 .346(4) Angstrom). The distance between phthalocyanine planes in this sandwich macromolecule is equal to 2.741(7) Angstrom. The two phthaloc yaninato moieties are rotated about 41.2-(4)degrees with respect to on e another. The magnetic susceptibility measurement shows a typical Cur ie-Weiss behavior. The effective magnetic moment is 1.67 mu(B). The EP R spectrum of InPcz exhibits a single strong signal at g = 2.0025.