A one-dimensional polymeric cobalt(III)-potassium complex with 18-crown-6, cyanide and porphyrinate ligands

The reaction of Co^II(TpivPP) {TpivPP is the dianion of 5,10,15,20-tetra­kis­[2-(2,2-di­methyl­propanamido)­phen­yl]por­ph­yrin} with an excess of KCN salts and an excess of the 18-crown-6 in chloro­benzene leads to the polymeric title compound catena-poly[[dicyanido-2κ²C-(1,4,7,10,13,16-hexa­oxa­cyclo­octa­decane-1κ⁶O){μ₃-(2α,2β)-5,10,15,20-tetra­kis­[2-(2,2-di­methyl­propanamido)­phen­yl]porphyrinato-1κO⁵:2κ⁴N,N′,N′′,N′′′:1′κO¹⁵}cobalt(III)potassium] dihydrate], {[CoK(CN)₂(C₁₂H₂₄O₆)(C₆₄H₆₄N₈O₄]·2H₂O}_n. The Co^III ion lies on an inversion center, and the asymmetric unit contains one half of a [Co^III(2α,2β-TpivPP)(CN)₂]⁻ ion complex and one half of a [K(18-C-6]⁺ counter-ion (18-C-6 is 1,4,7,10,13,16-hexa­oxa­cyclo­octa­deca­ne), where the K^I ion lies on an inversion center. The Co^III ion is hexa­coordinated by two C-bonded axial cyanide ligands and the four pyrrole N atoms of the porphyrin ligand. The K^I ion is chelated by the six O atoms of the 18-crown-6 mol­ecule and is further coordinated by two O atoms of pivalamido groups of the porphyrin ligands, leading to the formation of polymeric chains running along [011]. In the crystal, the polymeric chains and the lattice water mol­ecules are linked by N—H⋯O and O—H⋯N hydrogen bonds, as well as weak C—H⋯O, O—H⋯π and C—H⋯π inter­actions into a three-dimensional supra­molecular architecture.

(2.2.2-Cryptand)potassium bis-(cyanato-κN)(5,10,15,20-tetra-phenyl-por-phy-rin-ato-κ(4)N)cobaltate(III) chloro-benzene hemisolvate

In the title compound, [K(C₁₈H₃₆N₂O₆)][Co(NCO)₂(C₄₄H₂₈N₄)]·0.5C₆H₅Cl or [K(2,2,2-crypt)⁺][Co^III(NCO)₂(TPP)⁻]·0.5C₆H₅Cl, the Co^III ion is octa­hedrally coordin­ated by two axial N-bonded NCO⁻ anions and four pyrrole N atoms of the porphyrin. There is a major ruffling distortion of the porphyrin: the dihedral angles between trans pyrrole rings are 34.32 (14) and 34.72 (14)°. The potassium ion is coordinated by the six O atoms and two N atoms of the cryptand-222 mol­ecule and a weak K—O [3.407 (3) Å] bond to one of the cyanate O atoms also occurs. The packing also features weak C—H⋯O and C—H⋯π inter­actions. The contribution to the scattering of the disordered chloro­benzene solvent mol­ecules was removed with the SQUEEZE function in PLATON [Spek (2009 ▶). Acta Cryst. D65, 148–155].

Chlorido(pyridine-κN)(5,10,15,20-tetra-phenyl-porphyrinato-κ(4)N)cobalt(III) chloro-form hemisolvate

In the title complex, [CoCl(C(44)H(28)N(4))(C(5)H(5)N)]·0.5CHCl(3) or [Co(III)(TPP)Cl(py)]·0.5CHCl(3) (where TPP is the dianion of tetra-phenyl-porphyrin and py is pyridine), the average equatorial cobalt-pyrrole N atom bond length (Co-N(p)) is 1.958 (7) Å and the axial Co-Cl and Co-N(py) distances are 2.2339 (6) and 1.9898 (17) Å, respectively. The tetra-phenyl-porphyrinate dianion exhibits an important nonplanar conformation with major ruffling and saddling distortions. In the crystal, mol-ecules are linked via weak C-H⋯π inter-actions. In the difference Fourier map, a region of highly disordered electron density was estimated using the SQUEEZE routine [PLATON; Spek (2009 ▶), Acta Cryst. D65, 148-155] to be equivalent to one half-mol-ecule of CHCl(3) per mol-ecule of the complex.