Bis(4-dodecyloxyphenyl)diazene oxide

Abstract

Key indicatorsSingle-crystal X-ray study T = 123 K Mean (C-C) = 0.004 Å R factor = 0.117 wR factor = 0.226 Data-to-parameter ratio = 20.1 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e. # 2005 International Union of Crystallography Printed in Great Britain -all rights reservedThe title compound, C 36 H 58 N 2 O 3 , also known as a liquid crystalline material, has a phase sequence of crystal-smectic C-isotropic liquid. The two benzene rings are nearly coplanar with the central NNO group, and each paraffin chain has an all-trans conformation. The molecules form a tilted layer structure via intermolecular -, C-HÁ Á ÁO and C-HÁ Á Á interactions.

Crystal Structure and Emission Properties of 4,4'-Dimethoxy-2,2'-dihydroxybenzalazine

“…Numerous studies have been dedicated to determining their structural investigation, in an effort to ascertain the molecular aggregation mechanisms involved. Crystal structure analyses provide us with important information about intermolecular interactions (3)(4)(5)(6)(7)(8)(9)(10)(11). Good correlations have been found between the crystal structures and liquid-crystalline behaviours of some LCs, such as biphenyl derivatives (3,4), phenylbenzoate derivatives (5,6), azoxybenzene derivatives (7), azobenzene derivatives (8) and tropone derivatives (9)(10)(11).…”

Crystal Structure of <i>N</i>,<i>N</i>&prime;-Bis(5-octyloxytropon-2-yl)piperazine

“…There are intermolecular C-H·O and C-H·p interactions, as showninFig.3andTable3.TheH·Odistances(Table3)are close to this type of interaction (2.5 -2.7 Å). 6,7 For intermolecularC-H·pinteractions,thedistancebetweenH14B andC1 iii is2.856Å,whichagreewiththedistanceforthistype ofinteraction(2.8-3.1Å). 6,7 Theseinteractionsof1resemble those of N,N¢-bis(5-decyloxytropon-2-yl)piperazine.…”

“…6,7 For intermolecularC-H·pinteractions,thedistancebetweenH14B andC1 iii is2.856Å,whichagreewiththedistanceforthistype ofinteraction(2.8-3.1Å). 6,7 Theseinteractionsof1resemble those of N,N¢-bis(5-decyloxytropon-2-yl)piperazine. 3 The crystalsof1formsatiltedlayerstructure,suchasasmecticC phase, as shown in Fig.…”

Crystal Structure, Mesomorphic and Emission Properties of Liquid Crystals Having a 7-(Diethylamino)-3-phenylcoumarin Core

“…X-ray crystallographic analysis plays an important role to obtain the information about intermolecular interactions controlling mesophases. We have also reported the crystal structures of some liquid crystals such as 4-cyanophenyl 4-n-alkoxybenzoate 21) , bis(4-dodecyloxyphenyl)diazene 22) , N,N'-bis(5-alkoxy-tropon-2-yl)-piperazine 23) , 2,2'-dialkoxy-5,5'-bitro- All pictures taken on cooling from the isotropic phase.…”

“…Numerous studies have been dedicated to the structural investigation and the determination of the molecular aggregation mechanisms 3,[21][22][23][24][25][26] . X-ray crystallographic analysis plays an important role to obtain the information about intermolecular interactions controlling mesophases.…”