PREPARATION AND PROPERTIES OF PHTHALOCYAN INATO(2-)INDATES(III) WITH BIDENTATE OXO LIGANDS - CRYSTAL-STRUCTURE OF TETRA(N-BUTYL)AMMONIUM CARBONATE(O,O')PHTHALOCYANINATO(2-)INDATE(III)

Tetra(n-butyl)ammonium acidophthalocyaninato(2-)indate(III) of selecte d bidentate dioxo ligands (oxalate, catecholate, sulfate and carbonate ) are obtained by the reaction of tetra(n-butyl)ammonium cis-dihydroxo phthalocyaninato(2-)indate(III) with oxalic acid, catechol, hydrogensu lfate and ammonium carbaminate. The carbonate complex crystallizes mon oclinic in the space group P2(1)/c (No. 14). In-III is hexa-coordinate d by four isoindole nitrogen atoms (N-iso) and two oxygen atoms of the carbonate in a cis arrangement. In-III is directed out of the centre (Ct) of the (N-iso)(4) plane towards the carbonate ligand (d(In-Ct) = 0.903(1) A. The averaged (In-N-iso) and (In-O) distance is 2.1865(4) a nd 2.1585(5) Angstrom, the (O-In-O') angle 60.1(2)degrees. The phthalo cyaninate(2-) ligand (pc(2-)) is in a concave distortion. The optical spectra show the typical pi-pi transition of the pc(2-) ligand at 146 00 (B region), 28000 (Q), 35000 (N) und 40500 cm(-1) (L). In the IR sp ectra, the internal vibrations of the oxalate, sulfate and carbonate l igand and the asymmetric (In-O) stretching vibrations are well separat ed from the internal vibrations of the pc(2-) skeleton. Spectra-struct ure correlations are discussed.