The effect of N-methylation of tetra-aza-alkane copper complexes on the axial binding of anions

Gilad Golub; Anat Lashaz; Haim Cohen; Piero Paoletti; Bencini Andrea Bencini; Barbara Valtancoli; Dan Meyerstein

doi:10.1016/S0020-1693(96)05352-2

The effect of N-methylation of tetra-aza-alkane copper complexes on the axial binding of anions

Gilad Golub, Anat Lashaz, Haim Cohen, Piero Paoletti, Bencini Andrea Bencini, Barbara Valtancoli, Dan Meyerstein

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	111-115
Number of pages	5
Journal	Inorganica Chimica Acta
Volume	255
Issue number	1
DOIs	https://doi.org/10.1016/S0020-1693(96)05352-2
State	Published - 1 Feb 1997
Externally published	Yes

Bibliographical note

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.

Funding

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.

Funders	Funder number
Basic Research Foundation
Israel Atomic Energy Committee
Israel Academy of Sciences and Humanities
Council for Higher Education

Keywords

Aza macrocycle complexes
Copper complexes
Stability constants

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10.1016/S0020-1693(96)05352-2

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title = "The effect of N-methylation of tetra-aza-alkane copper complexes on the axial binding of anions",

abstract = "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.",

keywords = "Aza macrocycle complexes, Copper complexes, Stability constants",

author = "Gilad Golub and Anat Lashaz and Haim Cohen and Piero Paoletti and {Andrea Bencini}, Bencini and Barbara Valtancoli and Dan Meyerstein",

note = "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.",

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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

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The effect of N-methylation of tetra-aza-alkane copper complexes on the axial binding of anions

Abstract

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Keywords

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