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metal-organic compounds
The title compound, [Ni(C48H24N8)(C5H5N)2].2CH4O, is a high-spin bis(pyridine)-NiII derivative of an antipodally ![[beta]](/logos/entities/beta_rmgif.gif)
-pyrrole-tetracyano-substituted meso-tetraphenylporphyrin. The [Ni(py)2{tpp(CN)4}] molecule [py is pyridine and tpp(CN)4 is 7,8,17,18-tetracyano-5,10,15,20-tetraphenylporphyrinato] lies on a crystallographic centre of symmetry, but its non-crystallographic symmetry is close to D2 h. The core of the tpp(CN)4 porphyrin dianion is essentially planar. The high-spin state of the NiII cation leads to a lengthening of the Ni-N(pyrrole) bond distances relative to those present in the low-spin [NiIItpp] derivative. Moreover, the electron-withdrawing -pyrrole cyano substituents, which lie in the antipodal pyrrolic rings, cause an increase in the C7-C8 and the antipodal C7'-C8' bond distances as well as an opening of the C6-N2-C9 and the antipodal C6'-N2'-C9' bond angles.
-pyrrole-tetracyano-substituted meso-tetraphenylporphyrin. The [Ni(py)2{tpp(CN)4}] molecule [py is pyridine and tpp(CN)4 is 7,8,17,18-tetracyano-5,10,15,20-tetraphenylporphyrinato] lies on a crystallographic centre of symmetry, but its non-crystallographic symmetry is close to D2 h. The core of the tpp(CN)4 porphyrin dianion is essentially planar. The high-spin state of the NiII cation leads to a lengthening of the Ni-N(pyrrole) bond distances relative to those present in the low-spin [NiIItpp] derivative. Moreover, the electron-withdrawing -pyrrole cyano substituents, which lie in the antipodal pyrrolic rings, cause an increase in the C7-C8 and the antipodal C7'-C8' bond distances as well as an opening of the C6-N2-C9 and the antipodal C6'-N2'-C9' bond angles.
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