Substituted 2,2′-Bis(2-oxidobenzylideneamino)-4,4′-dimethyl-1,1′-biphenyl Complexes of Zinc

被引：7
|
作者：
Al-Shboul, Tareq M. A. [2 ]
Ziemann, Steffen [1 ]
Goerls, Helmar [1 ]
Krieck, Sven [1 ]
Westerhausen, Matthias [1 ]
机构：
[1] Friedrich Schiller Univ Jena FSU, Inst Inorgan & Analyt Chem, Humboldtstr 8, D-07743 Jena, Germany
[2] Tafila Tech Univ, Fac Sci, Dept Chem & Chem Technol, POB 179, Tafila 66110, Jordan
来源：
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2019年 / 645卷 / 03期
关键词：
Biphenyls; Salen-type ligands; Bis(salicylideneamino)biphenyls; Zinc; Crystal structure; ASYMMETRIC CATALYSIS; SALEN; IRON(II); ZN;
D O I：
10.1002/zaac.201800404
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The condensation reaction of 2,2-diamino-4,4-dimethyl-6,6'-dibromo-1,1-biphenyl with 2-hydroxybenzaldehyde as well as 5-methoxy-, 4-methoxy-, and 3-methoxy-2-hydroxybenzaldehyde yields 2,2-bis(salicylideneamino)-4,4-dimethyl-6,6-dibromo-1,1-biphenyl (1a) as well as the 5-, 4-, and 3-methoxy-substituted derivatives 1b, 1c, and 1d, respectively. Deprotonation of substituted 2,2-bis(salicylideneamino)-4,4-dimethyl-1,1-biphenyls with diethylzinc yields the corresponding substituted zinc 2,2-bis(2-oxidobenzylideneamino)-4,4-dimethyl-1,1-biphenyls (2) or zinc 2,2-bis(2-oxidobenzylideneamino)-4,4-dimethyl-6,6-dibromo-1,1-biphenyls (3). Recrystallization from a mixture of CH2Cl2 and methanol can lead to the formation of methanol adducts. The methanol ligands can either bind as Lewis base to the central zinc atom or as Lewis acid via a weak O-HO hydrogen bridge to a phenoxide moiety. Methanol-free complexes precipitate as dimers with central Zn2O2 rings.
引用
收藏
页码：292 / 300
页数：9
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