Novel water soluble palladium(II) complexes featuring tetrazolylacetic acids and their esters

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Novel water soluble palladium(II) complexes featuring tetrazolylacetic acids and their esters. / Protas, Aleksandra V.; Popova, Elena A.; Suslonov, Vitalii V.; Trifonov, Rostislav E.

In: Polyhedron, Vol. 124, 2017, p. 131-138.

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

BibTeX

@article{7c494ba72f26498e8402f64260863177,

title = "Novel water soluble palladium(II) complexes featuring tetrazolylacetic acids and their esters",

abstract = "2-R-2H-Tetrazol-5-ylacetic acids (R = iso-Pr, tert-Bu, CH2COOH) (1a–c) react with PdCl2in 5% (w/w) MeOH in 1 M HCl furnishing the palladium(II) water soluble complexes trans-[PdCl2L2] (2a–c). In the presence of EtOH in the reaction mixture, esterification of the tetrazolylacetoxy groups occurs leading to trans-[PdCl2(ethyl 2-R-2H-tetrazol-5-ylacetate)2] (3a–c). In the case of reaction of 2-tert-butyl-tetrazol-5-ylacetic acid 1b with PdCl2increasing of the proportion of methanol up to 50% (w/w) led to the esterification to give trans-[PdCl2(methyl 2-tert-butyl-tetrazol-5-ylacetate)2] 4b. Complexation of isomeric 5-methyl-1H-tetrazol-1-ylacetic acid 5 with PdCl2at the same conditions leads to trans-[PdCl2(5-methyl-1H-tetrazol-1-ylacetic acid)2] 6 and trans-[PdCl2(ethyl 2-(5-methyl-1H-tetrazol-1-yl)acetate)2] 7. The complexes obtained were characterized by HRESI+-MS,1H,13C{1H} NMR, and IR spectroscopies as well as by X-ray diffraction (for 2a, 3a, 3b, 4b and 6·H2O). According DSC/TG analysis the thermal decomposition of the complexes occurs by the same mechanism similar to that of the free ligands. In all cases it starts with evolution of molecular nitrogen from the tetrazole ligand which is accompanied by an exothermic effect.",

keywords = "2-R-2H-Tetrazolylacetic acids, Complexation, N-ligands, Palladium(II) complexes, Thermal stability structure",

author = "Protas, {Aleksandra V.} and Popova, {Elena A.} and Suslonov, {Vitalii V.} and Trifonov, {Rostislav E.}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd",

year = "2017",

doi = "10.1016/j.poly.2016.12.032",

language = "English",

volume = "124",

pages = "131--138",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Novel water soluble palladium(II) complexes featuring tetrazolylacetic acids and their esters

AU - Protas, Aleksandra V.

AU - Popova, Elena A.

AU - Suslonov, Vitalii V.

AU - Trifonov, Rostislav E.

PY - 2017

Y1 - 2017

N2 - 2-R-2H-Tetrazol-5-ylacetic acids (R = iso-Pr, tert-Bu, CH2COOH) (1a–c) react with PdCl2in 5% (w/w) MeOH in 1 M HCl furnishing the palladium(II) water soluble complexes trans-[PdCl2L2] (2a–c). In the presence of EtOH in the reaction mixture, esterification of the tetrazolylacetoxy groups occurs leading to trans-[PdCl2(ethyl 2-R-2H-tetrazol-5-ylacetate)2] (3a–c). In the case of reaction of 2-tert-butyl-tetrazol-5-ylacetic acid 1b with PdCl2increasing of the proportion of methanol up to 50% (w/w) led to the esterification to give trans-[PdCl2(methyl 2-tert-butyl-tetrazol-5-ylacetate)2] 4b. Complexation of isomeric 5-methyl-1H-tetrazol-1-ylacetic acid 5 with PdCl2at the same conditions leads to trans-[PdCl2(5-methyl-1H-tetrazol-1-ylacetic acid)2] 6 and trans-[PdCl2(ethyl 2-(5-methyl-1H-tetrazol-1-yl)acetate)2] 7. The complexes obtained were characterized by HRESI+-MS,1H,13C{1H} NMR, and IR spectroscopies as well as by X-ray diffraction (for 2a, 3a, 3b, 4b and 6·H2O). According DSC/TG analysis the thermal decomposition of the complexes occurs by the same mechanism similar to that of the free ligands. In all cases it starts with evolution of molecular nitrogen from the tetrazole ligand which is accompanied by an exothermic effect.

AB - 2-R-2H-Tetrazol-5-ylacetic acids (R = iso-Pr, tert-Bu, CH2COOH) (1a–c) react with PdCl2in 5% (w/w) MeOH in 1 M HCl furnishing the palladium(II) water soluble complexes trans-[PdCl2L2] (2a–c). In the presence of EtOH in the reaction mixture, esterification of the tetrazolylacetoxy groups occurs leading to trans-[PdCl2(ethyl 2-R-2H-tetrazol-5-ylacetate)2] (3a–c). In the case of reaction of 2-tert-butyl-tetrazol-5-ylacetic acid 1b with PdCl2increasing of the proportion of methanol up to 50% (w/w) led to the esterification to give trans-[PdCl2(methyl 2-tert-butyl-tetrazol-5-ylacetate)2] 4b. Complexation of isomeric 5-methyl-1H-tetrazol-1-ylacetic acid 5 with PdCl2at the same conditions leads to trans-[PdCl2(5-methyl-1H-tetrazol-1-ylacetic acid)2] 6 and trans-[PdCl2(ethyl 2-(5-methyl-1H-tetrazol-1-yl)acetate)2] 7. The complexes obtained were characterized by HRESI+-MS,1H,13C{1H} NMR, and IR spectroscopies as well as by X-ray diffraction (for 2a, 3a, 3b, 4b and 6·H2O). According DSC/TG analysis the thermal decomposition of the complexes occurs by the same mechanism similar to that of the free ligands. In all cases it starts with evolution of molecular nitrogen from the tetrazole ligand which is accompanied by an exothermic effect.

KW - 2-R-2H-Tetrazolylacetic acids

KW - Complexation

KW - N-ligands

KW - Palladium(II) complexes

KW - Thermal stability structure

UR - http://www.scopus.com/inward/record.url?scp=85009443026&partnerID=8YFLogxK

U2 - 10.1016/j.poly.2016.12.032

DO - 10.1016/j.poly.2016.12.032

M3 - Article

VL - 124

SP - 131

EP - 138

JO - Polyhedron

JF - Polyhedron

SN - 0277-5387

ER -

ID: 7613240