Correlation among crystal shape, absolute configuration, and circular dichroism spectrum of enantiomorphs of tris[2-(((2-phenylimidazol-4-yl)methylidene)amino)ethyl]-aminemetal(II) nitrate - Methanol (1/1)

S. Nagasato, I. Katsuki, Y. Motoda, Y. Sunatsuki, N. Matsumoto, M. Kojima

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

A series of metal(II) complexes of a tripod-type ligand with the chemical formulas [M(H3L)](NO3)2·MeOH (M = Mn (1), Fe (2), Co (3), Ni (4), Zn (6)) and [Cu(H3L)](NO3)2·CH3 CN·H2O (5) were synthesized and characterized (H3L = tris[2-(((2-phenylimidazol-4-yl)methylidene)amino)ethyl]amine). The crystal structures were determined, in which those of 1-4 and 6 are isomorphous and conglomerates, because they crystallize into the acentric space group P212121. Each metal(II) ion of 1-4 and 6 assumes an octahedral coordination environment with the N6 donor atoms of the tripod ligand and becomes either a C (clockwise) or an A (anticlockwise) enantiomorph because of the screw arrangement of the tripod-type ligand around the metal(II) ion. The crystals were divided into two groups, where their crystal shapes are mirror images and their CD spectra show enantiomeric patterns. The circular dichroism (CD) spectrum of the crystal used for the X-ray analysis was measured. The absolute configuration of the enantiomorph of the crystal used for the X-ray analysis was determined by the Flack parameter. The correlation among the crystal shape, the absolute configuration, and the CD spectral pattern was thus confirmed for 1-4 and 6. On the other hand, 5 assumes a square pyramidal coordination geometry with the N5 donor atoms, and hence, there are no optical isomers.

Original languageEnglish
Pages (from-to)2534-2540
Number of pages7
JournalInorganic Chemistry
Volume40
Issue number11
DOIs
Publication statusPublished - May 21 2001
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Fingerprint Dive into the research topics of 'Correlation among crystal shape, absolute configuration, and circular dichroism spectrum of enantiomorphs of tris[2-(((2-phenylimidazol-4-yl)methylidene)amino)ethyl]-aminemetal(II) nitrate - Methanol (1/1)'. Together they form a unique fingerprint.

  • Cite this