Preparation and stereochemistry of cobalt(III) complexes containing 1,1,11,11-tetraphenyl-4,8-diaza-1,11-diphosphaundecane or (3S,9S)-3,9-dimethyl-1,1,11,11-tetraphenyl-4,8-diaza-1,11-diphosphaundecane, (C6H5)2CHRNHCH2CH2CH2NHCHRCH2P(C6H5)2 (R=H or CH3).

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概要

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• Two new quadridentate phosphine ligands 1,1,11,11-tetraphenyl-4,8-diaza-1,11-diphosphaundecane (pp-232PNNP) and (3<I>S</I>,9<I>S</I>)-3,9-dimethyl-1,1,11,11-tetraphenyl-4,8-diaza-1,11-diphosphaundecane (<I>SS</I>(<I>C</I>)-pp-232PNNP), and several their cobalt(III) complexes were prepared and characterized. The <I>RS</I>(<I>N</I>) isomers of <I>trans</I>-[CoCl<SUB>2</SUB>(pp- or <I>SS</I>(<I>C</I>)-pp-232PNNP)]<SUP>+</SUP> were formed by oxidation of cobalt(II) complexes of these ligands in dichloromethane with chlorine, while the <I>RR</I>,<I>SS</I>(<I>N</I>), and <I>RR</I>(<I>N</I>) isomers of the pp-232PNNP and <I>SS</I>(<I>C</I>)-pp-232PNNP complexes, respectively, were derived from the corresponding carbonato complexes and hydrochloric acid. The [Co(O-O)(pp- or SS(C)-pp-232PNNP)]<SUP><I>n</I>+</SUP> (O–O= CO<SUB>3</SUB><SUP>2−</SUP>, C<SUB>2</SUB>O<SUB>4</SUB><SUP>2−</SUP>, C<SUB>5</SUB>H<SUB>7</SUB>O<SUB>2</SUB><SUP>−</SUP>) complexes yielded only a cisβ isomer. The stereochemistry of the complexes was discussed on the basis of the absorption, circular dichroism and NMR spectra.

著者

• Jung Min-ho

  Department Of Advanced Materials Engineering Korea Advanced Institute Of Science And Technology

• Kashiwabara Kazuo

  Department Of Chemistry Faculty Of Science Nagoya University

• Fujita Junnosuke

  Department of Chemistry Faculty of Science Osaka University

• Atoh Masamichi

  Department of Chemistry, Faculty of Science, Nagoya University

• Jung Min-Ho

  Department of Chemistry, Faculty of Science, Nagoya University

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