Bis[6-(cyclopentyliminomethyl)-2-methoxyphenolato]nickel(II)

Abstract

Key indicatorsSingle-crystal X-ray study T = 298 K Mean (C-C) = 0.002 Å R factor = 0.028 wR factor = 0.075 Data-to-parameter ratio = 17.6For details of how these key indicators were automatically derived from the article, see

Bis{(E)-2-ethoxy-6-[2-(ethylammonio)ethyliminomethyl]phenolato}nickel(II) bis(perchlorate)

“…The Ni(II) atom is four-coordinated by two imine N and two phenolate O atoms from two zwitterionic Schiff base ligands in a square-planar coordination geometry. The coordinate bond lengths (Table 1) are typical and comparable to the corresponding values observed in similar nickel(II) Schiff base complexes (Zhao, 2007;Skovsgaard et al, 2005;Ma et al, 2008).…”

“…For background to the chemistry of the Schiff base complexes, see: Ali et al (2008); Biswas et al (2008); Carlsson et al (2002,2004); Chen et al (2008); Darensbourg & Frantz (2007); Habibi et al (2007); Kawamoto et al (2008); Tomat et al (2007); Wu et al (2008); Yuan et al (2007). For related structures, see: Ma et al (2008); Skovsgaard et al (2005); Zhao (2007).…”

Bis{4-[(Z)-(4-fluorobenzylamino)(phenyl)methylene]-3-methyl-1-phenyl-1H-pyrazol-5(4H)-onato-κ2N4,O}nickel(II)

“…The Ni II ion is in a distorted square-planar coordination geometry which is different from other square-planar geometry (Wang, 2006;Li & Wang, 2007) and is coordinated by two N atoms of imine and two O atoms of pyrazoylone from two Schiff base ligands L. The geometry is distorted towards tetrahedral. The bond angles around Ni II center range from 96.63 (5) to 146.30 (8)° and the Ni-N [1.951 (1) Å] and Ni-O [1.924 (1) Å] bond lengths in (I) are in the expected range for such complexes (Zhao, 2007;Peng et al, 2006).…”

Using invariom modelling to distinguish correct and incorrect central atoms in `duplicate structures' with neighbouring 3delements

“…In this project, 11 pairs of centrosymmetric crystal structures (Zhang, 2007;Liu, 2007a,b;Wu et al, 2007;Liu et al, 2007;Wang et al, 2005a,b;Zhu et al, 2003Zhu et al, , 2006Ju et al, 2006;You, 2005a,b;Chen, 2006;Wang, 2007;Zhao, 2007;Hou, 2007;Wang & Qiu, 2006;Sun et al, 2005a,b;Yang, 2005a,b;Liu & Zeng, 2006) from data deposited in the CSD were investigated. Each pair had the same unit cell and compound geometry, but contained different metals as the central atom.…”

“…(1) Square planar Zhang (2007) Cu The same Cu correct M on special position ( " 1 1) Liu (2007a) N i (2) Octahedral Wu et al (2007) Ni The same Cu correct Three water molecules in the asymmetric unit Liu et al (2007) Cu 3Octahedral Wang et al (2005b) Ni Not the same Ni correct Was also compared with Cu Wang et al (2005a) Co Four water molecules in the asymmetric unit 4Octahedral Zhu et al (2003) Ni The same Ni correct Ju et al (2006) Co 5Square planar You (2005b) Ni Not the same Ni correct M and C10 on special positions Chen (2006) Co Space group A2 1 am (6) Square planar Wang (2007) Ni The same Cu correct M on special position ( " 1 1) Liu (2007b) C u 7Square planar Zhao (2007) Ni Not the same Cu correct M on special position ( " 1 1) Hou (2007) Cu 8Tetrahedral Sun et al (2005b) Ni Not the same Most likely Zn Isotypic with pair (9) Wang & Qiu (2006) Co Most likely Zn 9Tetrahedral Yang (2005a) Cu Not the same Cu or Zn Isotypic with pair (8) You (2005a) Z n C u o r Z n (10) Tetrahedral Yang (2005b) Cu The same Cu fits better Average data quality, different resolutions Liu & Zeng (2006) Ni M on special position (2) (11)…”