Coordination chemistry of mercury(ii) with 2-pyridylnitrones: monomers to polymers. Issue 11 (27th February 2017)

• Record Type: Journal Article
• Authors: Azizpoor Fard, Mahmood; Behnia, Ava; Puddephatt, Richard J.
• Is Part Of: Dalton transactions. Volume 46:Issue 11(2017)
• Page Start: 3579
• Page End: 3587
• Publication Date: 2017-02-27
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c7dt00050b
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The coordination chemistry of mercury(ii ) halides, HgX2, X = Cl, Br, I, with N -methyl-α-(2-pyridyl)nitrone, L1, and N-t -butyl-α-(2-pyridyl)nitrone, L2, is reported. Abstract : The coordination chemistry of mercury(ii ) halides, HgX2, X = Cl, Br, I, with N -methyl-α-(2-pyridyl)nitrone, L1, and N-t -butyl-α-(2-pyridyl)nitrone, L2, is reported. The structures of 1 : 1 complexes [HgX2 L ], X = Cl, L =L1 ; X = Br, L =L2, 2 : 1 complexes [(HgX2 )2 L ], X = Br or I, L =L1 ; X = Cl or I, L =L2, and a unique compound [(HgBr2 )5 (L2 )3 ] have been determined. In the 1 : 1 and 1 : 2 complexes, the ligandL1 adopts the anti conformation, and is either monodentate or bridging, while the ligandL2 adopts the syn conformation and acts as a chelate ligand. In the compound [(HgBr2 )5 (L2 )3 ] the ligandL2 is present in both syn -chelate and anti -bridging bonding modes. Secondary intermolecular bonding, involving O⋯Hg or X⋯Hg interactions, can lead to association of the molecular compounds to form polymers of several kinds. In solution, the complexes are labile and the crystalline products do not necessarily reflect the reaction stoichiometry.