In:
European Journal of Inorganic Chemistry, Wiley, Vol. 2017, No. 10 ( 2017-03-10), p. 1341-1354
Abstract:
A new subgroup of bis(pyrazolyl)methane ligands has been developed through the synthesis of the first N , N , N , N ‐tetradentate bis(pyrazolyl)methane compounds, namely, bis(pyrazolyl)bipyridinylmethane [HC(Pz) 2 Bipy, L1 ] and bis(3,5‐methylpyrazolyl)bipyridinylmethane [HC(3,5‐MePz) 2 Bipy, L2 ]. From these ligands, a large variety of new mononuclear Fe II and Zn II complexes with counterions ranging from halides to carboxylates and sulfate were synthesised and characterised by X‐ray crystallography. The complexes [Fe{HC(Pz) 2 Bipy}X 2 ] (X = Cl – , CF 3 CO 2 – , CF 3 SO 3 – ), [Fe{HC(3,5‐MePz) 2 Bipy}X 2 ] (X = Cl – , CF 3 CO 2 – ) and [Zn{HC(Pz) 2 Bipy}X 2 ] (X = Cl – , CF 3 CO 2 – ) were tested in the melt ring‐opening polymerisation of sublimed and unsublimed technical‐grade rac ‐lactide at 150 °C. The complex [Fe{HC(Pz) 2 Bipy}(CF 3 CO 2 ) 2 ] showed the most promising results and produced a conversion of 87 % after 30 h with molecular weights of M w ≈ 30000 g mol –1 .
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.v2017.10
DOI:
10.1002/ejic.201601345
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
1475009-0
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