Details

Autor(en) / Beteiligte

• Shin, Sujin
• Ahn, Seoung Hyun
• Jung, Maeng Joon
• Nayab, Saira
• Lee, Hyosun

Titel

Synthesis, structure and methyl methacrylate polymerization of cobalt(II), zinc(II) and cadmium(II) complexes with N,N′,N-bidentate versus N,N′,N-tridentate N,N′,N-bis((1H-pyrazol-1-yl)methyl)amines

Ist Teil von

• Journal of coordination chemistry, 2016-08, Vol.69 (16), p.2391-2402

Ort / Verlag

Abingdon: Taylor & Francis

Erscheinungsjahr

2016

Link zum Volltext

Quelle

AUTh Library subscriptions: Taylor & Francis Journals

Beschreibungen/Notizen

• Mononuclear Co(II), Zn(II) and Cd(II) complexes derived from bidentate or tridentate N,N′,N-bis((1H-pyrazol-1-yl)methyl)amines (L n  = L A , L B ), where L A is N,N-bis((1H-pyrazol-1-yl)methyl)-3-methoxypropan-1-amine and L B is 3-methoxy-N,N-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)propan-1-amine, have been synthesized and characterized. The geometry at Co(II) and Cd(II) for [L A CoCl 2 ], [L B CoCl 2 ] and [L B CdBr 2 ] with N,N′,N-tridentate ligands (L n  = L A , L B ) can be described as a distorted trigonal bipyramid achieved by coordinative interaction of N pyrazole , two halides and the nitrogen of amine moiety. However, the molecular structure of four-coordinate [L A ZnCl 2 ] can be best described as tetrahedral, resulting in an eight-membered chelate ring. [L A CoCl 2 ] polymerized methyl methacrylate in the presence of modified methylaluminoxane at 60 °C and resulted in poly(methylmethacrylate) (PMMA) with higher molecular weight and narrower polydispersity index compared to the other synthesized complexes. However, all the synthesized complexes yielded syndiospecific PMMA, characterized using 1 H NMR spectroscopy, with ca. 0.70.