Alkali metal and zinc complexes of a bridging 2,5-diamino-1,4- benzoquinonediimine ligand

Yuanting Su, Yanxia Zhao, Jing Gao, Qingsong Dong, Biao Wu, Xiao Juan Yang*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

29 引用 (Scopus)

摘要

Two alkali metal complexes of a bridging 2,5-diamino-1,4- benzoquinonediimine ligand (dipp-dabqdiH 2), [(thf) 2Li(μ-dipp-dabqdi)Li(thf) 2] (1) and [(dme) 1.5Na(μ-dipp-dabqdi)Na(dme) 1.5] n (2, dme = 1,2-dimethoxyethane), have been synthesized by the reaction of dipp-dabqdiH 2 with Li nBu or sodium metal. In addition, treatment of 1,2,4,5-tetrakis(2,6-diisopropylamino)benzene (dipp-tabH 4) with potassium metal in dme afforded the complex [(dme) 2K(μ-dipp- tabH 2)K(dme) 2] (3). X-ray crystal diffraction analyses revealed that complexes 1 and 3 have dinuclear structures, while the sodium complex 2 aggregates to a one-dimensional polymer through bridging dme ligands. With increasing ion radius, the coordination number of the alkali metal (Li, Na, and K) increases from four to five to six, while the coordination geometry changes from distorted tetrahedral to square pyramidal and further to octahedral in 1, 2, and 3, respectively. The salt metathesis reactions of 1 and 2 with anhydrous ZnCl 2 yielded the ion-contacted zinc complexes [(thf) 3Li(μ-Cl)ClZn(μ-dipp-dabqdi)ZnCl(μ-Cl)Li(thf) 3] (4), [(dme) 2Li(μ-Cl)ClZn(μ-dippdabqdi)ZnCl(μ-Cl)Li(dme) 2] (5), and [(dme) 2Na(μ-Cl) 2Zn(μ-dipp- dabqdi)Zn(μ-Cl) 2Na(dme) 2] (6), respectively. The ligand exists as the dianionic form in compounds 1-6 upon double deprotonation, and a complete electronic delocalization (except for 3) of the quinonoid π-system is observed between the metal centers over the two N=C - =C - N halves of the ligand. The electronic structures of the complexes were studied by density functional theory (DFT) computations.

源语言英语
页(从-至)5889-5896
页数8
期刊Inorganic Chemistry
51
10
DOI
出版状态已出版 - 21 5月 2012
已对外发布

指纹

探究 'Alkali metal and zinc complexes of a bridging 2,5-diamino-1,4- benzoquinonediimine ligand' 的科研主题。它们共同构成独一无二的指纹。

引用此