Coordination Chemistry Reviews, volume 174, issue 1, pages 255-282
Hydrogen bonding in tungsten (VI) salicylate free acids
Timothy E Baroni
,
Timothy E Baroni
1
,
Scott D. Bembenek
1
,
Scott Bembenek
,
Joseph A Heppert
1
,
Rolande R Hodel
1
,
BRIAN B. LAIRD
,
Brian Laird
1
,
Martha D Morton
,
Martha D. Morton
2
,
Denise L Barnes
1
,
Fusao Takusagawa
1
1
University Of Kansas
|
2
Department of Chemistry , The University of Kansas , Lawrence, KS, 66045, USA
|
Publication type: Journal Article
Publication date: 1998-07-01
Journal:
Coordination Chemistry Reviews
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 20.6
ISSN: 00108545
Materials Chemistry
Inorganic Chemistry
Physical and Theoretical Chemistry
Abstract
Hydrogen-bonded free acid dimers of the formula [W(X)Cl3(Hsal–R)]2 (where X=O (1), NC6H3-2,6-Me2 (2), Ph2C2 and Hsal–R=substituted salicylate monoanion) are prepared through reactions between W(X)Cl4 precursors and functionalized salicylic acids (H2sal–R). Download : Download full-size image The free acids are stable at ambient temperature and exist as dimers in solution, although the structure of the dimer is not known. Spectroscopic studies show that the electronic characteristics of the π-donor ligands directly affect the electronic environments of the carboxylate functionality. This influence is observed in weaker binding constants of diethyl ether (KX) as the X ligand becomes more strongly π donating: O⩾NC6H3–2,6-Me2>Ph2C2. In other words, the oxo and aryl imido species are more acidic than the diphenylacetylene compounds in the Bronsted sense owing to the higher Lewis acidity of their tungsten centers. Salicylate adducts of the type W(X)Cl3(Hsal–R)⋯OR2′ (X=O (3), NC6H3–2,6-Me2 (4)) and W(X)Cl3(Hsal–R)⋯NEt3 (X=O (5), NC6H3–2,6-Me2 (6)) have been isolated and characterized. A comparison of two structures, W(NC6H3–2,6-Me2)Cl3(Hsal–3-Me⋯L) where L=OEt2 (4c) and NEt3 (6c), shows that 6c has more charge localization on both the carboxylate group and tungsten center than 4c. The charge separation in amine adducts (i.e. salts) contributes to association of these salts with the free acid (i.e. W(X)Cl3(Hsal–R⋯L)⋯[W(X)Cl3(Hsal–R)]). The strong hydrogen bonding exhibited by the free acids leads to the formation of supramolecular complexes organized around poly(ether) templates, including dimethoxyethane (in 3e) and 18-crown-6.
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Baroni T. E. et al. Hydrogen bonding in tungsten (VI) salicylate free acids // Coordination Chemistry Reviews. 1998. Vol. 174. No. 1. pp. 255-282.
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Baroni T. E., Baroni T. E., Bembenek S., Bembenek S. D., Heppert J. A., Hodel R. R., LAIRD B. B., Laird B., Morton M. D., Morton M. D., Barnes D. L., Takusagawa F. Hydrogen bonding in tungsten (VI) salicylate free acids // Coordination Chemistry Reviews. 1998. Vol. 174. No. 1. pp. 255-282.
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TY - JOUR
DO - 10.1016/S0010-8545(98)00055-1
UR - https://doi.org/10.1016/S0010-8545(98)00055-1
TI - Hydrogen bonding in tungsten (VI) salicylate free acids
T2 - Coordination Chemistry Reviews
AU - Baroni, Timothy E
AU - Bembenek, Scott
AU - Heppert, Joseph A
AU - Hodel, Rolande R
AU - LAIRD, BRIAN B.
AU - Morton, Martha D
AU - Barnes, Denise L
AU - Takusagawa, Fusao
AU - Baroni, Timothy E
AU - Bembenek, Scott D.
AU - Laird, Brian
AU - Morton, Martha D.
PY - 1998
DA - 1998/07/01 00:00:00
PB - Elsevier
SP - 255-282
IS - 1
VL - 174
SN - 0010-8545
ER -
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@article{1998_Baroni,
author = {Timothy E Baroni and Scott Bembenek and Joseph A Heppert and Rolande R Hodel and BRIAN B. LAIRD and Martha D Morton and Denise L Barnes and Fusao Takusagawa and Timothy E Baroni and Scott D. Bembenek and Brian Laird and Martha D. Morton},
title = {Hydrogen bonding in tungsten (VI) salicylate free acids},
journal = {Coordination Chemistry Reviews},
year = {1998},
volume = {174},
publisher = {Elsevier},
month = {jul},
url = {https://doi.org/10.1016/S0010-8545(98)00055-1},
number = {1},
pages = {255--282},
doi = {10.1016/S0010-8545(98)00055-1}
}
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Baroni, Timothy E., et al. “Hydrogen bonding in tungsten (VI) salicylate free acids.” Coordination Chemistry Reviews, vol. 174, no. 1, Jul. 1998, pp. 255-282. https://doi.org/10.1016/S0010-8545(98)00055-1.