An efficient synthetic method for organometallic radicals: structures and properties of gold(i)-(nitronyl nitroxide)-2-ide complexes.
One-pot synthesis of (nitronyl nitroxide)-gold(i)-phosphine (NN-Au-P) complexes has been developed using chloro(tetrahydrothiophene)gold(i), phosphine ligands, nitronyl nitroxide radicals, and sodium hydroxide. The NN-Au-P complexes can be easily handled because they were quite stable under aerated conditions in both solution and crystalline states. They showed weak absorption bands with vibrational structures in the 450-650 nm region. The oxidation potentials assigned to the NN moieties of NN-Au-P complexes with aromatic phosphines were observed around -0.1 V vs. Fc/Fc+(-0.11 V for NN-Au-1, -0.08 V for NN-Au-2, -0.13 V for NN-Au-5, and -0.07 V for NN-Au-6), somewhat lower than that of NN-Au-P complexes with aliphatic phosphines (-0.25 V for NN-Au-3 and -0.17 V for NN-Au-4).
Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan. suzuki-s@chem.es.osaka-u.ac.jp okadak@sci.osaka-u.ac.jp and Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
Shuichi
http://orcid.org/0000-0001-6294-9084
S
Suzuki
Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan. suzuki-s@chem.es.osaka-u.ac.jp okadak@sci.osaka-u.ac.jp.
Sayaka
http://orcid.org/0000-0003-4156-4243
S
Kira
Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan. suzuki-s@chem.es.osaka-u.ac.jp okadak@sci.osaka-u.ac.jp.
Masatoshi
http://orcid.org/0000-0002-9737-5639
M
Kozaki
Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
Masaki
M
Yamamura
Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
Toru
T
Hasegawa
Graduate School of Pure and Applied Sciences and Tsukuba Research Center for Interdisciplinary Materials Science (TIMS), University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
Tatsuya
http://orcid.org/0000-0003-1269-7725
T
Nabeshima
Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka, Osaka 558-8585, Japan. suzuki-s@chem.es.osaka-u.ac.jp okadak@sci.osaka-u.ac.jp.
Keiji
http://orcid.org/0000-0002-2817-9335
K
Okada