Crystal structures of 3,3′-bis­(hy­droxy­dimethylsilan­yl)azo­benzene and 4,4′-bis­(hy­droxy­dimethyl­silane)azo­benzene

Acta Crystallographica Section E: Crystallographic Communications

Staubitz, A.¹  Strü³  Presa-Soto, D.³  ben, J.⁶  Nä⁶  ther, C.⁸  Hoffmann, J.⁸ 

[1] Department of Organic and Inorganic Chemistry IUQOEM, University of Oviedo, JuliáInstitut füOtto-Diels-Institut fün Claveria, 33006 Oviedo, Spain;r Anorganische Chemie, Christian-Albrechts-Universitär Organische Chemie, Christian-Albrechts-Universität Kiel, Max-Eyth-Strasse 2, 24118 Kiel, Germany;t Kiel, Otto-Hahn-Platz 4, 24118 Kiel, Germany

关键词: CRYSTAL STRUCTURE;    AZOBENZENE;    O-H...O HYDROGEN BONDING;   

DOI  :  10.1107/S2056989016016297

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

The title compounds {systematic names (E)-[diazene-1,2-diylbis(3,1-phenyl­ene)]bis­(di­methyl­silanol) and (E)-[diazene-1,2-diylbis(4,1-phenyl­ene)]bis­(di­methyl­silanol)}, both of the sum formula C16H22N2O2Si2, were obtained by transmetallation of the respective bis-stannylated azo­benzenes with di­chloro­dimethyl­silane and esterification followed by hydrolysis. The asymmetric unit of 3,3′-diazenediylbis[dimeth­yl(phen­yl)silanol] (with the silanol functional group in a meta position) consists of two mol­ecules, of which one occupies a general position, whereas the second is located on a centre of inversion. In 4,4′-diazenediylbis[dimeth­yl(phen­yl)silanol] (with the silanol functional group in a para position) likewise two mol­ecules are present in the asymmetric unit, but in this case both occupy general positions. Differences between all mol­ecules can be found in the torsions about the N=N bond, as well as in the dihedral angles between the benzene rings. In both structures, inter­molecular O—H⋯O hydrogen bonding is observed, leading to the formation of layers parallel to (01-1) for (I) and to chains parallel to the a axis for (II).

【 授权许可】

CC BY