Pyridyl- and diphenylphosphinoethyl-functionalised N-heterocyclic carbene platinum methyl complexes

作者：Tsoureas Nikolaos; Danopoulos Andreas A^*

来源：Journal of Organometallic Chemistry, 2015, 775: 178-187.

DOI：10.1016/j.jorganchem.2014.07.010

• N-Heterocyclic carbenes
• Platinum
• Cationic
• Weakly coordinating
• Alkyl complexes

The novel platinum (II) dimethyl complexes Pt(kappa(2)-L1)Me-2 and Pt(kappa(2)-L1)Me-2 (1), Pt(kappa(2)-L2a)Me-2 (2a) and Pt(kappa(2)-L2b)Me-2 (2b) bearing the functionalised N-heterocyclic carbenes (NHCs), L1 = 1-(2-diphenylphosphinoethyl)-3-(2,6-diisopropyl-phenyl)-imidazol-2-ylidene, L2a = 1-(2-pyridyl)-3-(2,6-diisopropyl-phenyl)-imidazol-2-ylidene, L2b = 1-(2-(3-picolinyl))-3-(2, 6-diisopropyl-phenyl)-imidazol-2-ylidene, react with the acid [H(Et2O)(2)B+(Ar-F)(4)(-)], Ar-F = 3, 5-(CF3)(2)C6H3, in the presence of various neutral donors (Dn) to give the salts [{Pt(kappa(2)-L)(Me)(Dn)}(+){B(Ar-F)(4)}(-) ], where Dn occupies specifically the site trans to the P and the C-NHC donor atoms of the coordinated ligands L1 and L2a, L2b, respectively. Spectroscopic data give evidence that the same selectivity prevails when other acids are employed. Activation of the Cl-CH2Cl bond by 2b led to [Pt(kappa(2)-L2b)(Me)Cl], while reaction of CH3I with the dimethyl complexes led to isolable [Pt(kappa(2)-L)Me3I] species.

• 出版日期2015-1-1