Synthesis, crystal structure and photophysical properties of N-heterocyclic carbene Pd(II), Pt(II) complexes and iodine adduct

• Published in: Polyhedron 2003-06, Vol.22 (12), p.1515-1521
• Main Authors: Liu, Qing-Xiang, Song, Hai-Bin, Xu, Feng-Bo, Li, Qing-Shan, Zeng, Xian-Shun, Leng, Xue-Bin, Zhang, Zheng-Zhi
• Format: Article
• Language: English
• Subjects: Carbenes; Crystal structures; Iodine; Luminescence; Palladium; Platinum
• ISSN: 0277-5387
• DOI: 10.1016/S0277-5387(03)00268-7

In the presence of KOBu t , 1-(9-anthracenylmethyl)-3-ethylimidazolium iodide ( 1) is treated with PdCl 2 and Pt(cod)Cl 2 in acetonitrile and THF to afford the luminescent complexes [1-(9-anthracylmethyl)-3-ethylimidazol-2-ylidene] 2PdCl 2 ( 2) and [1-(9-anthracylmethyl)-3-ethylimidazol-2-ylidene] 2PtCl 2 ( 3), respectively, and an analogous treatment with iodine affords [1-(9-anthracylmethyl)-3-ethylimidazol-2-ylidene I] + I 3 − ( 4). In a refluxed CH 2Cl 2 solution imidazolium salt 1 is transformed into another salt 1-(9-anthracylmethyl)-3-ethylimidazol-2-ylidene chloride ( 5). The luminescent emission spectra of 1, 2, 3 and 4 are determined. 1-(9-Anthracenylmethyl)-3-ethylimidazolium iodide ( 1) is treated with PdCl 2, Pt(cod)Cl 2 or iodine to afford [1-(9-anthracylmethyl)-3-ethylimidazol-2-ylidene] 2PdCl 2 ( 2), [1-(9-anthracylmethyl)-3-ethylimidazol-2-ylidene] 2PtCl 2 ( 3), on [1-(9-anthracylmethyl)-3-ethylimidazol-2-ylidene I] + I 3 − ( 4), respectively. In CH 2Cl 2 solution 1 is transformed into 1-(9-anthracylmethyl)-3-ethylimidazol-2-ylidene chloride ( 5).