Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya, том 37, издание 5, номера страниц: 333-342

Regularities of the formation of binuclear homo- and heteroleptic complexes of d metals with 3,3′-bis(dipyrrolylmethenes) in DMF

Dudina N. A. 1
Antina E. V. 1
1
 
Institute of Chemistry of Solutions, Russian Academy of Sciences, Ivanovo, Russia
Тип документаJournal Article
Дата публикации2011-05
ИздательPleiades Publishing
Название журналаRussian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya
Квартиль по SCImagoQ3
Квартиль по Web of ScienceQ3
Импакт-фактор 20211.81
ISSN10703284, 16083318
General Chemistry
General Chemical Engineering
Краткое описание
The reactions of seven symmetrically alkylated tetradentate ligands 3,3′-bis(dipyrrolylmethenes) (H2L) with d-metal acetates (M(AcO)2) in DMF solutions at 298.15 K were studied by spectrophotometry. Helicands H2L were found to be structurally preorganized to form stable binuclear homoleptic two-helix helicates [M2L2] with Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II) acetates. The coordination of the ligands by the metal ions included consecutive stages of formation of the heteroleptic [M2L(AcO)2] and homoleptic [M2L2] complexes. The [M2L(AcO)2] complexes were spectrally revealed in solutions containing a ligand excess (c H 2 L / c M(AcO) 2 > 1). An increase in the salt concentration shifted the system of equilibria to the homoligand product [M2L2]. The thermodynamic constants of the reactions increased in the series of complexing agents: Cu(II) < Cd(II) < Hg(II) < Ni(II) < Co(II) < Zn(II). An analysis of the data on the thermodynamic constants of [M2L2] helicate formation in solutions and the earlier obtained results of the IR and 1H NMR studies of the hydrobromic salts of the ligands (H2L · 2HBr) showed that the key regularities of the influence of the structural factors on the coordination properties of the ligands were in an increase in the stability of the [M2L2] complexes with an increase in the basicity of the ligands.
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1. Dudina N. A., Antina E. V., Guseva G. B. Regularities of the formation of binuclear homo- and heteroleptic complexes of d metals with 3,3′-bis(dipyrrolylmethenes) in DMF // Russian Journal of Coordination Chemistry. 2011. Т. 37. № 5. С. 333–342.
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TY - JOUR

DO - 10.1134/s1070328411040026

UR - http://dx.doi.org/10.1134/S1070328411040026

TI - Regularities of the formation of binuclear homo- and heteroleptic complexes of d metals with 3,3′-bis(dipyrrolylmethenes) in DMF

T2 - Russian Journal of Coordination Chemistry

AU - Dudina, N. A.

AU - Antina, E. V.

AU - Guseva, G. B.

PY - 2011

DA - 2011/05

PB - Pleiades Publishing Ltd

SP - 333-342

IS - 5

VL - 37

SN - 1070-3284

SN - 1608-3318

ER -

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@article{Dudina_2011,

doi = {10.1134/s1070328411040026},

url = {https://doi.org/10.1134%2Fs1070328411040026},

year = 2011,

month = {may},

publisher = {Pleiades Publishing Ltd},

volume = {37},

number = {5},

pages = {333--342},

author = {N. A. Dudina and E. V. Antina and G. B. Guseva},

title = {Regularities of the formation of binuclear homo- and heteroleptic complexes of d metals with 3,3$\prime$-bis(dipyrrolylmethenes) in {DMF}},

journal = {Russian Journal of Coordination Chemistry}

}

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Dudina, N. A., et al. “Regularities of the Formation of Binuclear Homo- and Heteroleptic Complexes of d Metals with 3,3′-Bis(Dipyrrolylmethenes) in DMF.” Russian Journal of Coordination Chemistry, vol. 37, no. 5, May 2011, pp. 333–42. Crossref, https://doi.org/10.1134/s1070328411040026.