Deprotonated Amines Formed Through Coordination to Sulfur/Oxygen-Bridged Incomplete Cubane-Type Molybdenum Clusters |
| |
| Authors: | Takashi Shibahara Noriko Kurimoto Shunji Kiyoda Yoshimasa Kobayashi Genta Sakane |
| |
| Affiliation: | (1) Department of Chemistry, Okayama University of Science, Ridai-cho, Okayama, 700-0005, Japan;(2) Research Institute for Advanced Science and Technology, Osaka Prefecture University, Gakuen-cho, Sakai-shi, Osaka, 599-8570, Japan |
| |
| Abstract: | Oxygen/sulfur-bridged incomplete cubane-type molybdenum aqua clusters [Mo3( 3-S)(-X)(-S)2(H2O)9]4+ (X=O, S) in hydrochloric acid react with dien (diethylenetriamine) to give [Mo3(3-S)(-X)(-S)2(dien–)(dien)2]Cl3·nH2O [1, X=O, n=3; 2, X=S, n=4; dien–=NH2(CH2)2NH(CH2)2NH–], respectively, where each cluster has a deprotonated dien. The X-ray structural analysis of 1 revealed proton dissociation from an amino group of one of the three dien ligands: one Mo–N distance [1.987(4) Å] is clearly shorter than the other eight Mo–N distances [2.229(3)–2.276(3) Å]. The 1H NMR spectra of the Mo–dien clusters 1 and 2 in D2O show two well-resolved methylene proton signals in the 2.8- to 3.0-ppm region, which indicates that both deprotonated amines in 1 and 2 receive D+ ions from solvent D2O. The factors for the proton dissociation are discussed. |
| |
| Keywords: | deprotonated amines sulfur-bridge incomplete cubane-type molybdenum cluster 1H NMR |
| 本文献已被 SpringerLink 等数据库收录！ |
|
