DI-m-IODO-BIS(PHTHALOCYANINATO)BISMUTH

Krzysztof Ejsmont^1,2 and Ryszard Kubiak²

1) Institute of Chemistry, University of Opole, Oleska 48, 45-052 Opole, Poland, e-mail: eismont@uni.opole.pl
2) W. Trzebiatowski Institute of Low Temperature and Structural Research, Polish Academy of Sciences, P.O.Box 1410, 50-950 Wroc3aw 2, Poland

Keywords: bismuth phthalocyanine, crystal and molecular structure

The following crystal and molecular structures of bismuth phthalocyanine complexes are known: BiPc₂·CH₂Cl₂ [1], BiPc₂(I₃)_0.5 [2] (BiPc)(BiI₄) [3] where Pc=C₃₂H₁₆N₈. Here we present the crystal and molecular structure of (BiPcI)₂.

The crystals are built up from the dimers of BiPcI units linked by two bridging iodine atoms. The similar dimeric structure was also observed in SbPcI [4]. In the dimer two bismuth and two iodine atoms form irregular square of dimensions 3.3427(9)A and 3.362(1)A and angles of 85.98(3) and 94.02(3)^o. The intramolecular distance between the bismuth atoms in the dimer is 4.904(2) and between iodine atoms is 4.571(2)A. In the BiPc unit the displacement of the bismuth atom from the N₄ plane (N₄ - four isoindole nitrogen atoms) equals to 1.177A. The mean Bi-N₄ distance is 2.299(9)A. The average bond distances in the phthalocyanine ring are 1.318(7) for C-N_aza, 1.378(7) for C-N_isoindole and 1.40(1)A for C-C. The dimers are linked by a week hydrogen bonds (I1---H5 and equivalents) and form a two dimensional sheets.

[1] G. Ostendorp and H. Homborg, Z. anorg. allg. Chem., 622 (1996) 873-880.
[2] J. Janczak and R. Kubiak, Inorg. Chem. Acta, (1998) in press.
[3] R. Kubiak and K. Ejsmont, J. Mol. Struct., (1998) in press.
[4] R. Kubiak and M. Razik, Acta Cryst. C54 (1998) 488-485.