Syntheses and Characterizations of Hetero-Bimetallic Chromium-Dinitrogen Transition-Metal Complexes

被引:5
作者
Wang, Xueli [1 ]
Wang, Yixi [1 ]
Wu, Yue [1 ]
Wang, Gao-Xiang [1 ]
Wei, Junnian [1 ]
Xi, Zhenfeng [1 ]
机构
[1] Peking Univ, Coll Chem, Beijing Natl Lab Mol Sci BNLMS, MOE Key Lab Bioorgan Chem & Mol Engn,Minist Educ, Beijing 100871, Peoples R China
基金
北京市自然科学基金; 中国国家自然科学基金;
关键词
ETHYLENE POLYMERIZATION; MOLYBDENUM; ACTIVATION; TITANIUM; LIGANDS; N-2; COORDINATION; CHEMISTRY; DIAZENIDO; FIXATION;
D O I
10.1021/acs.inorgchem.3c02944
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
In the domain of N-2 activation, hetero-bimetallic dinitrogen complexes are garnering substantial interest due to their potential to induce polarization in nonpolar N-2 gas. Herein, we present the syntheses and characterizations of three novel hetero-multimetallic dinitrogen complexes: Cp*Cr(depe)N2V(depe)(Me)[O, P, O] 5, Cp*Cr(depe)N2V(depe)(Tipp)[O, P, O] 6, and [Cp*Cr(depe)N-2](2)Ti-Tipp[O, P, O] 7. These complexes were synthesized via a transmetalation process involving the treatment of [Cr-0-N-2](-) complex 4 with vanadium and titanium chloride complexes bearing alkyl or aryl substituted bis(o-hydroxyphenyl)-phenyl phosphine (R)[O, P, O] ligand (alkyl = methyl, aryl = 2,4,6-tri-isopropylbenzene). X-ray analysis shows that complexes 5 and 6 exhibit heterodinuclear structures, while complex 7 exhibits a heterotrinuclear core with two N-2 ligands concurrently coordinated to two chromium and one titanium atoms. Raman spectroscopic data show that the N-N stretching vibration of the N-2 moiety is clearly downshifted relative to free N-2 and to mononuclear [Cr-0-N-2](-) complex 4.
引用
收藏
页码:18641 / 18648
页数:8
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