The results of the analysis of thermal stability for zinc ((II)) and boron complexes with 3,3',5,5'tetramethyl-4-ethyl-4'-iodo-2,2-dipyrrin [HL1], 3,3'-diamyl-4,4'-dimethyl-5,5'-dibromo-2,2'-dipyrrin [HL2] and 3,3',5,5'-tetramethyl-4,4'-dibromo-2,2'-dipyrrin [HL3] of the composition [Zn(L-1)(2).-[Zn (L-3)(2)] and [BF2L1]-[BF2L3] are presented. The influence of halogenation of dipyrrin ligand is manifested in decreasing thermal stability of [Zn(L)(2)] and [BF2L] when replacing 4,4'-dibromosubstituted dipyrrin on 5,5'-dibromo- or 4-monoiodosubstituted ligand. Intramolecular red-ox-reactions with participation of halogen atoms are the main cause of thermal stability lowering of dipyrrinates [Zn(L)(2)] and [BF2L] compared with alkylsubstituted analogs. The obtained results are interesting for the development of laser dyes and sensors for PDT. (C) 2015 Elsevier B.V. All rights reserved.