Synthesis and structural characterization of cis isomer of 1,2,3-triazol-5-ylidene based palladium complexes

Saravanakumar, Rajendran ; Ramkumar, Venkatachalam ; Sankararaman, Sethuraman (2013) Synthesis and structural characterization of cis isomer of 1,2,3-triazol-5-ylidene based palladium complexes Journal of Organometallic Chemistry, 736 . pp. 36-41. ISSN 0022-328X

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.jorganchem.2013.03.008

Abstract

A palladium complex (3) of abnormal N-Heterocyclic Carbene (NHC) namely, 4-(hydroxymethyl)-3-methyl-1-phenyl-1H-1,2,3-triazol-5-ylidene was prepared via silver carbene transmetalation method and characterized by spectroscopic and single crystal XRD data. Single crystal analysis revealed the structure of the complex 3 to be a cisisomer. The synthesis of palladium complex 6via silver carbene transmetalation method led to a mixture of cis–trans isomers. In this case trans isomer was formed as major product. We have reported earlier the synthesis and structural characterization of transisomer (trans-6). However, the presence of cis isomer was not recognized until the crude reaction mixture was recrystallized from acetonitrile. Pure cis isomer (cis-6) was obtained by washing the cis–trans mixture with acetonitrile followed by slow evaporation of acetonitrile solution at 35°C. Structure of cis (cis-6) isomer was unambiguously established by single crystal XRD data.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
Keywords:N-Heterocyclic Carbenes (NHCs); Abnormal Carbene; Transmetalation; Palladium; 1,2,3-Triazolylidene
ID Code:109610
Deposited On:02 Aug 2017 12:51
Last Modified:24 Nov 2022 10:39

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