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 1H NMR and X-ray crystallography. The structure shows unusual features, including a highly ruffled macrocycle, and very strong intra- and inter-molecular hydrogen bonds. Crystal data for [(TMCP)Co(H2O)2]ClO4·MeOH·3H2O: C50.5H71ClCoN4O19 orthorhombic, space group P212121, a=11.7432(7), b=15.7240(9), c=29.720(2) Å, U=5487.7(6) Å3, Z=4. Full-matrix least-squares refinement of positional and thermal parameters, using 9641 independent reflections with I>2σ(I) led to R1=0.0568.