The Role of Hydrogen Bond and Crystal Solvent in the Solid-state (β-α) Photoisomerization of Novel 2-(N-phenylcarbamoyl)ethyl Cobaloxime Complexes [1]

Yoshiki Ohgo Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8551, Japan

Yuji Ohash Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8551, Japan

Mieko Hagiwara Niigata College of Pharmacy, Kamishin-ei cho, Niigata, 950-21, Japan

Mitsuru Shida Niigata College of Pharmacy, Kamishin-ei cho, Niigata, 950-21, Japan

Yoshifusa Arai Niigata College of Pharmacy, Kamishin-ei cho, Niigata, 950-21, Japan

Seiji Takeuchi Niigata College of Pharmacy, Kamishin-ei cho, Niigata, 950-21, Japan

Yoshiaki Ohgo Niigata College of Pharmacy, Kamishin-ei cho, Niigata, 950-21, Japan

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Abstract

The 2-(phenylcarbamoyl)ethyl group bonded to the cobalt atom in cobaloxime complexes was isomerized on exposure to visible light in the solid-state. The three complexes with different amines as axial base ligands were prepared and their crystal structures were determined by X-ray analysis. The reaction rates in the solid-state were mainly affected by the hydrogen bonds of the reactive group with the neighboring molecules and the occupation of crystal solvent molecules around the reactive group.

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