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Comparison of molecular structures of cis-bis[8-(dimethylphosphanyl)quinoline]nickel(II) and -platinum(II) complex cations
The crystal structures of the complexes (SP-4-2)-cis-bis[8-(dimethylphosphanyl)quinoline-κ(2) N,P]nickel(II) bis(perchlorate) nitromethane monosolvate, [Ni(C(11)H(12)NP)(2)](ClO(4))(2)·CH(3)NO(2) (1), and (SP-4-2)-cis-bis[8-(dimethylphosphanyl)quinoline-κ(2) N,P]platinum(II) bis(tetrafl...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7784645/ https://www.ncbi.nlm.nih.gov/pubmed/33520259 http://dx.doi.org/10.1107/S2056989020014437 |
Sumario: | The crystal structures of the complexes (SP-4-2)-cis-bis[8-(dimethylphosphanyl)quinoline-κ(2) N,P]nickel(II) bis(perchlorate) nitromethane monosolvate, [Ni(C(11)H(12)NP)(2)](ClO(4))(2)·CH(3)NO(2) (1), and (SP-4-2)-cis-bis[8-(dimethylphosphanyl)quinoline-κ(2) N,P]platinum(II) bis(tetrafluoroborate) acetonitrile monosolvate, [Pt(C(11)H(12)NP)(2)](BF(4))(2)·C(2)H(3)N (2), are reported. In both complex cations, two phosphanylquinolines act as bidentate P,N-donating chelate ligands and form the mutually cis configuration in the square-planar coordination geometry. The strong trans influence of the dimethylphosphanyl donor group is confirmed by the Ni—N bond lengths in 1, 1.970 (2) and 1.982 (2) Å and, the Pt—N bond lengths of 2, 2.123 (4) and 2.132 (4) Å, which are relatively long as compared to those in the analogous 8-(diphenylphosphanyl)quinoline complexes. Mutually cis-positioned quinoline donor groups would give a severe steric hindrance between their ortho-H atoms. In order to reduce such a steric congestion, the Ni(II) complex in 1 shows a tetrahedral distortion of the coordination geometry, as parameterized by τ(4) = 0.199 (1)°, while the Pt(II) complex in 2 exhibits a typical square-planar coordination geometry [τ(4) = 0.014 (1)°] with a large bending deformation of the ideally planar Me(2)Pqn chelate planes. In the crystal structure of 2, three F atoms of one of the BF(4) (−) anions are disordered over two sets of positions with refined occupancies of 0.573 (10) and 0.427 (10). |
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