ISSN:
1434-1948
Keywords:
Liquid crystals
;
Palladium
;
Metallomesogens
;
Orthometallated imine
;
Thiolate
;
Chemistry
;
General Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The dinuclear cyclopalladated compounds [Pd(μ-Cl)Ln]2(2) [HLn = p-CnH2n+1OC6H4CH=NC6H4OCnH2n+1-p (n = 6, 8, and 10)] react with silver thiolates AgSRm (Rm = CmH2m+1, m = 6, 8, 10, and 18) to give dinuclear derivatives with mixed bridges [Pd2(μ-Cl)(μ-SRm)Ln2] (3). Treatment of derivatives 2 with silver acetate (Pd/AgOAc = 2:1) or treatment of [Pd(μ-OAc)Ln]2 (1) with thiols HSRm (Pd/thiol = 2:1) affords acetato-thiolato bridged complexes [Pd2(μ-OAc)(μ-SRm)Ln2] (4). In addition to their mesogenic behavior, the most interesting feature of these complexes is the cis disposition of the palladium-imine moieties, that can be inferred from their 1H-NMR spectra. The cis structure as well as the disposition of the bridges was confirmed by the X-ray diffraction study of 3 (n = m = 4).
Type of Medium:
Electronic Resource
