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Tripodal Iminophenolate Ligand Complexes of Gallium(III), Indium(III), and Thallium(III)
Author(s) -
Figuet Mélanie,
AverbuchPouchot Marie Thérèse,
d’Hardemare Amaury du Moulinet,
Jarjayes Olivier
Publication year - 2001
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200108)2001:8<2089::aid-ejic2089>3.0.co;2-b
Subject(s) - chemistry , ligand (biochemistry) , denticity , octahedron , gallium , thallium , crystallography , tripodal ligand , chelation , metal , amine gas treating , inorganic chemistry , stereochemistry , crystal structure , organic chemistry , biochemistry , receptor
Abstract The polydentate tripodal Schiff base ligand H 3 L has been prepared by treating a methanolic solution of tris(aminoethyl)amine and 5‐bromosalicylaldehyde. This ligand, and its complexes with group‐13 metal ions (Ga III , In III , and Tl III ) have been characterized by elemental analysis, NMR spectroscopy, FAB + ‐MS, and X‐ray diffraction analysis. The ligand, not preorganized in the solid state, acts as a hexadentate N 3 O 3 ligand in all cases to form octahedral structures, the apical nitrogen not being involved in the chelation even for the [Tl( L )] complex. NMR studies reveal that the intact and rigid structures of the complexes are maintained in solution. For the [Tl( L )] complex, long‐range thallium isotope effect on the chemical shift (δ H and δ C ) and on the coupling constants ( J Tl‐H and J Tl‐C ) has been observed, confirming a strong and stable bond between Tl III and H 3 L .