Comparison of mol­ecular structures of cis-bis­[8-(di­methyl­phosphan­yl)quinoline]­nickel(II) and -platinum(II) complex cations

Mori, Masatoshi; Suzuki, Takayoshi

doi:10.1107/s2056989020014437

Permalink : http://escholarship.lib.okayama-u.ac.jp/61487

ID	61487
FullText URL	fulltext.pdf 1.09 MB
Author	Mori, Masatoshi Graduate School of Natural Science and Technology, Okayama University Suzuki, Takayoshi Research Institute for Interdisciplinary Science, Okayama University ORCID Kaken ID publons researchmap
Abstract	The crystal structures of the complexes (SP-4-2)-cis-bis[8-(dimethylphosphanyl)quinoline-κ2 N,P]nickel(II) bis(perchlorate) nitromethane monosolvate, [Ni(C11H12NP)2](ClO4)2·CH3NO2 (1), and (SP-4-2)-cis-bis[8-(dimethylphosphanyl)quinoline-κ2 N,P]platinum(II) bis(tetrafluoroborate) acetonitrile monosolvate, [Pt(C11H12NP)2](BF4)2·C2H3N (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 NiII complex in 1 shows a tetrahedral distortion of the coordination geometry, as parameterized by τ4 = 0.199 (1)°, while the PtII complex in 2 exhibits a typical square-planar coordination geometry [τ4 = 0.014 (1)°] with a large bending deformation of the ideally planar Me2Pqn chelate planes. In the crystal structure of 2, three F atoms of one of the BF4 − anions are disordered over two sets of positions with refined occupancies of 0.573 (10) and 0.427 (10).
Keywords	8-quinolylphosphane asymmetrical bidentate ligand square-planar coordination tetrahedral distortion trans influence trans influence
Published Date	2020
Publication Title	Acta Crystallographica Section E Crystallographic Communications
Volume	volumeE76
Publisher	International Union of Crystallography (IUCr)
Start Page	1813
End Page	1817
ISSN	2056-9890
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
File Version	publisher
PubMed ID	33520259
DOI	10.1107/s2056989020014437
Web of Science KeyUT	000600542500004
License	https://creativecommons.org/licenses/by/4.0/
Funder Name	Japan Society for the Promotion of Science
助成番号	K05146

Comparison of mol­ecular structures of cis-bis­[8-(di­methyl­phosphan­yl)quinoline]­nickel(II) and -platinum(II) complex cations

Comparison of molecular structures of cis-bis[8-(dimethylphosphanyl)quinoline]nickel(II) and -platinum(II) complex cations