Original scientific paper

The Crystal Structure, Absolute Configuration and Circular Dichroism of (-)CD630 - and (+ )CD630 -cis-Bis[2-(2-benzoxazolyl)phenol-N]dichloroplatinum(II) . Ethanol

Akiko Furuhashi ; Department of Chemistry, Aoyama Gakuin University, Morinosato-Aoyama, Atsugi-shi, Kanagawa 243-01, Japan
Kunihiko Endo ; Department of Chemistry, Aoyama Gakuin University, Morinosato-Aoyama, Atsugi-shi, Kanagawa 243-01, Japan
Yoshifusa Kondo ; Department of Chemistry, Faculty of Science and Technology, Aoyama Gakuin University, Chitosedai, Setagaya-ku, Tokyo 157, Japan
Akira Ouchi ; Department of Chemistry, College of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153, Japan
Yoshihiko Saito ; Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223, Japan

Abstract

The crystals of the title complex resolve spontaneously, They
are orthorhombic, space group P212121, a = 1034.6(4), b = 3120(6),
c = 835.3(4) pm and Z = 4. The final R values of the enantiomers
are 0.036 and 0.047 for 2873 and 3622 unique reflections, respectively.
This is a square-planar complex with 2 Cl atoms in cispositions.
The Iigand molecule acts as a unidentate and is coordinated
to the Pt atom with its N atom. The average Pt-Cl and Pt-N distances are 228.9(3) and 200.9(8) pm, respectively. The two benzoxazolyl moieties are approximately related by a twofold rotation axis through the central Pt atom and the midpoint of the two N atoms. The optical activity arises from the dissymmetric disposition of the two ligand molecules with respect to the coordination plane. The CD spectra in the range 13,000-40,000 cm-1 were measured in KBr matrix. The CD patterns were correlated with the absolute configuration as well as the crystal habit.

Keywords

Hrčak ID:

175389

URI

https://hrcak.srce.hr/175389

Publication date:

30.6.1989.

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