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X-ray investigations on the cyclopalladated mesogen bis-{5-(1-nonyl)-2{[4′1-nonyloxy)phenyl-2′-ato]}pyrimidine-N′,C2′]-μ-iodo}dipalladium(II)

 

作者: Mauro Ghedini,   Daniela Pucci,   Roberto Bartolino,   Oriano Francescangeli,  

 

期刊: Liquid Crystals  (Taylor Available online 1993)
卷期: Volume 13, issue 2  

页码: 255-263

 

ISSN:0267-8292

 

年代: 1993

 

DOI:10.1080/02678299308026299

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

The cyclopalladated complex [Pd(L3)(μ-I)]2([Pd(L3)(μ -I)]2= bis-{5-(1-nonyl)-2{[4′(1-nonyloxy)phenyl-2′-ato]}pyrimidine-N′,C2′]-μ-iodo}dipaladium (II); C→105·1°C (C1)→128·1°C (SA)→202·5°C (I)) has been investigated by X-ray diffraction and the electron density profile along the director, in the smectic phase, determined. [Pd(L3(μ -I)]2is a mesogenic species with a lateral-lateral fused molecular shape whose main features are: (i) the solid C1phase when observed with a polarizing microscope gives a polygonal texture like a smectic A phase, and (ii) to describe properly the electron density profile along the director a model which takes into account a high electron density area (i.e. the four aromatic rings and the Pd2I2fragment) extending perpendicular to the director is required.

 

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