dc.contributor.author |
Brusko V. |
|
dc.contributor.author |
Rakhmatullin A. |
|
dc.contributor.author |
Shtyrlin V. |
|
dc.contributor.author |
Krivolapov D. |
|
dc.contributor.author |
Litvinov I. |
|
dc.contributor.author |
Zabirov N. |
|
dc.date.accessioned |
2018-09-18T20:07:48Z |
|
dc.date.available |
2018-09-18T20:07:48Z |
|
dc.date.issued |
2006 |
|
dc.identifier.issn |
0277-5387 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/136798 |
|
dc.description.abstract |
The crystal structure of the complex [Ni{PhNHC(S)NP(S)(OPr i)2-S,S}2] has been determined and its behavior in dichloromethane solution investigated by NMR 31P spectroscopy. The X-ray structural analysis shows the nickel atom at the symmetry center in a distorted square-planar arrangement with trans-disposition of the ligands. The six-membered cycle NiS(1)PNCS(2) has the form of the asymmetric boat. In dichloromethane solutions of the compound four signals have been detected by 31P-{1H} NMR method. These signals are related to three diamagnetic square-planar isomers with different dispositions and conformations of two ligands in anti-orientation: trans-chair-boat (A), cis-boat-boat (B), and trans-boat-boat (C). These isomers are in slow exchange equilibria. It was shown that all these forms are in rather fast chemical exchange with minor (unobserved) paramagnetic pseudo-tetrahedral isomers (AT, B T, and CT). The thermodynamic constants of equilibria between A, B, and C as well as rate constants and activation parameters for conversion of three square-planar to respective pseudo-tetrahedral forms were calculated from the 31P-{1H} NMR data. © 2005 Elsevier Ltd. All rights reserved. |
|
dc.relation.ispartofseries |
Polyhedron |
|
dc.subject |
Chelates |
|
dc.subject |
Chemical exchange |
|
dc.subject |
Isomers |
|
dc.subject |
Nickel |
|
dc.subject |
S ligands |
|
dc.subject |
Thermodynamic |
|
dc.title |
Crystal structure and dynamic behavior of [Ni{PhNHC(S)NP(S)(OPr i)2-S,S}2] complex in dichloromethane solution |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
6 |
|
dc.relation.ispartofseries-volume |
25 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
1433 |
|
dc.source.id |
SCOPUS02775387-2006-25-6-SID33645082218 |
|