TY - JOUR
T1 - The effect of N-methylation of tetra-aza-alkane copper complexes on the axial binding of anions
AU - Golub, Gilad
AU - Lashaz, Anat
AU - Cohen, Haim
AU - Paoletti, Piero
AU - Andrea Bencini, Bencini
AU - Valtancoli, Barbara
AU - Meyerstein, Dan
N1 - Funding Information:
This study was supported by grants from the Basic Research Foundation, The Israel Academy of Sciences and Humanities, and from the Planning and Budgeting Committee of the Israeli Council for Higher Education and the Israel Atomic Energy Committee. D.M. wishes to express his thanks to Mrs Irene Evens for her continuous interest and support.
PY - 1997/2/1
Y1 - 1997/2/1
N2 - The stability constants of the Cu(II) complex of Me6tren (Me6tren=tris-(2-dimethylaminoethyl)amine) were determined. The axial binding constants of F-, Br-, I- and N3- to Cu(tren)2+ and Cu(Me6tren)2+ (tren=tris-(2-aminoethyl)amine) were measured. The results obtained are compared with those of the axial binding constants of the isomers, i.e. the complexes Cu(trien)2+ and Cu(Me6trien)2+ (trien=1,4,7,10-tetraazadecane; Me6trien=2,5,8,11-tetramethyl-2,5,8,11-tetraazadodecane). The results point out that N-methylation transforms the Cu(II)L complexes into stronger and harder acids. Properties of the copper complexes with TMC (1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane) and with Me6trpn (tris-(3-dimethylaminopropyl)amine) are also reported.
AB - The stability constants of the Cu(II) complex of Me6tren (Me6tren=tris-(2-dimethylaminoethyl)amine) were determined. The axial binding constants of F-, Br-, I- and N3- to Cu(tren)2+ and Cu(Me6tren)2+ (tren=tris-(2-aminoethyl)amine) were measured. The results obtained are compared with those of the axial binding constants of the isomers, i.e. the complexes Cu(trien)2+ and Cu(Me6trien)2+ (trien=1,4,7,10-tetraazadecane; Me6trien=2,5,8,11-tetramethyl-2,5,8,11-tetraazadodecane). The results point out that N-methylation transforms the Cu(II)L complexes into stronger and harder acids. Properties of the copper complexes with TMC (1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane) and with Me6trpn (tris-(3-dimethylaminopropyl)amine) are also reported.
KW - Aza macrocycle complexes
KW - Copper complexes
KW - Stability constants
UR - http://www.scopus.com/inward/record.url?scp=0001488248&partnerID=8YFLogxK
U2 - 10.1016/S0020-1693(96)05352-2
DO - 10.1016/S0020-1693(96)05352-2
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AN - SCOPUS:0001488248
SN - 0020-1693
VL - 255
SP - 111
EP - 115
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 1
ER -