Bis-aqua-cobalt(III)-tetramethylchiroporphyrin perchlorate: a selective water metalloreceptor

Bis-aqua-cobalt(III)-tetramethylchiroporphyrin perchlorate [(TMCP)Co(H2O)(2 )]ClO4, was prepared and characterized by H-1 NMR and X-ray crystallography . The structure shows unusual features, including a highly ruffled macrocyc le, and very strong intra- and inter-molecular hydrogen bonds. Crystal data for [(TMCP)Co(H2O)(2)]ClO4. MeOH . 3H(2)O: C50.5H71ClCoN4O19 orthorhombic, space group P2(1)2(1)2(1), a = 11.7432(7), b = 15.7240(9), c = 29.720(2) A ngstrom, U = 5487.7(6) Angstrom(3), Z = 4. Full-matrix least-squares refine ment of positional and thermal parameters, using 9641 independent reflectio ns with I > 2 sigma(I) led to R-1 = 0.0568. (C) 2000 Elsevier Science S.A. All rights reserved.