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A Bis(μ-phenoxo)-Bridged Dizinc Complex with Hydrolytic Activity

Mitra, Mainak LU ; Singh, Reena LU ; Pyrkosz-Bulska, Monika ; Haukka, Matti ; Gumiena-Kontecka, Elzbieta and Nordlander, Ebbe LU (2013) In Zeitschrift für Anorganische und Allgemeine Chemie 639(8-9). p.1534-1542
Abstract
The dinuclear complex [Zn2(papy)2]·2CH3OH [H2papy = N-

(2-hydroxybenzyl)-N-(2-picolyl)glycine] was synthesized and characterized.

The crystal structure of the complex reveals that both ZnII ions

are pentacoordinate with distorted pentagonal bipyramidal coordination

arrangements. The phenoxyl groups of each ligand bridge the two

metal atoms, whereas each carboxylate of the ligand is terminally

bound to one ZnII ion. Potentiometric studies of the ZnII:H2papy system

in a methanol/water mixture show the existence of a mononuclear species at lower pH; but at a pH above 5, a dimeric species starts to

dominate and transforms further into a bis(μ-phenoxo) bridged... (More)
The dinuclear complex [Zn2(papy)2]·2CH3OH [H2papy = N-

(2-hydroxybenzyl)-N-(2-picolyl)glycine] was synthesized and characterized.

The crystal structure of the complex reveals that both ZnII ions

are pentacoordinate with distorted pentagonal bipyramidal coordination

arrangements. The phenoxyl groups of each ligand bridge the two

metal atoms, whereas each carboxylate of the ligand is terminally

bound to one ZnII ion. Potentiometric studies of the ZnII:H2papy system

in a methanol/water mixture show the existence of a mononuclear species at lower pH; but at a pH above 5, a dimeric species starts to

dominate and transforms further into a bis(μ-phenoxo) bridged dizinc

complex by deprotonation of phenolic hydrogen. A kinetic study of

the hydrolysis of bis(2,4-dinitrophenyl)phosphate at different pH, catalyzed

by complex 1, indicates a maximum rate at pH 9, where the

bis(μ-phenoxo)-bridged dizinc species corresponding to 1 dominates

in solution. (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Zeitschrift für Anorganische und Allgemeine Chemie
volume
639
issue
8-9
pages
1534 - 1542
publisher
Wiley-Blackwell
external identifiers
  • wos:000330180900031
  • scopus:84880517197
ISSN
0044-2313
DOI
10.1002/zaac.201300160
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
id
a8980a87-2337-435f-8696-66e97953120c (old id 4316647)
date added to LUP
2016-04-01 14:28:18
date last changed
2022-02-27 02:50:20
@article{a8980a87-2337-435f-8696-66e97953120c,
  abstract     = {{The dinuclear complex [Zn2(papy)2]·2CH3OH [H2papy = N-<br/><br>
(2-hydroxybenzyl)-N-(2-picolyl)glycine] was synthesized and characterized.<br/><br>
The crystal structure of the complex reveals that both ZnII ions<br/><br>
are pentacoordinate with distorted pentagonal bipyramidal coordination<br/><br>
arrangements. The phenoxyl groups of each ligand bridge the two<br/><br>
metal atoms, whereas each carboxylate of the ligand is terminally<br/><br>
bound to one ZnII ion. Potentiometric studies of the ZnII:H2papy system<br/><br>
in a methanol/water mixture show the existence of a mononuclear species at lower pH; but at a pH above 5, a dimeric species starts to<br/><br>
dominate and transforms further into a bis(μ-phenoxo) bridged dizinc<br/><br>
complex by deprotonation of phenolic hydrogen. A kinetic study of<br/><br>
the hydrolysis of bis(2,4-dinitrophenyl)phosphate at different pH, catalyzed<br/><br>
by complex 1, indicates a maximum rate at pH 9, where the<br/><br>
bis(μ-phenoxo)-bridged dizinc species corresponding to 1 dominates<br/><br>
in solution.}},
  author       = {{Mitra, Mainak and Singh, Reena and Pyrkosz-Bulska, Monika and Haukka, Matti and Gumiena-Kontecka, Elzbieta and Nordlander, Ebbe}},
  issn         = {{0044-2313}},
  language     = {{eng}},
  number       = {{8-9}},
  pages        = {{1534--1542}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Zeitschrift für Anorganische und Allgemeine Chemie}},
  title        = {{A Bis(μ-phenoxo)-Bridged Dizinc Complex with Hydrolytic Activity}},
  url          = {{http://dx.doi.org/10.1002/zaac.201300160}},
  doi          = {{10.1002/zaac.201300160}},
  volume       = {{639}},
  year         = {{2013}},
}