Synthesis, characterization and structural systematics in diorganotin complexes with O,N,O' tris-chelating semirigid diaza-scaffolds: Mono- vs. di-nuclear Compounds
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62690094%3A18470%2F20%3A50017240" target="_blank" >RIV/62690094:18470/20:50017240 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S0022328X20304253" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0022328X20304253</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jorganchem.2020.121522" target="_blank" >10.1016/j.jorganchem.2020.121522</a>
Alternative languages
Result language
angličtina
Original language name
Synthesis, characterization and structural systematics in diorganotin complexes with O,N,O' tris-chelating semirigid diaza-scaffolds: Mono- vs. di-nuclear Compounds
Original language description
A series of nine novel diorganotin(IV) complexes of O,N,O' chelating ligands were synthesized viz., [n-Bu2Sn(L-2)](2)center dot 0.25(C6H14) (1), [Me2Sn(L-1)](2)center dot(C7H8) (2), [n-Bu2Sn(L-1)](2)center dot(C7H8) (3), [Me2Sn(L-3)](2)center dot(C7H8) (4), 2 [n-Bu2Sn(L-3)](2)center dot 4 (n-Bu2Sn(L-3)) (5), [Ph2Sn(L-3)] (6), [Ph2Sn(L-1)] (7), [Ph2Sn(L-4)] (8) and [Ph2Sn(L-2)] (9) and structurally characterized. The ligand scaffolds differ with respect to the chemical link between the coordinating N and O atoms, which is either an alkyl or an aryl moiety. Diffraction results indicate that the smallest methyl groups favor dimerization via Sn-O-Sn bridging and six-coordination at the cation. Among these dinuclear derivatives, more asymmetric oxygen bridges and longer Sn center dot center dot center dot Sn separations are found for the less nucleophilic phenolate O. In contrast, the bulky phenyl substituents prevent aggregation for both classes of ligands and always lead to five-coordinated mononuclear species. The n-Bu groups are sterically more demanding than Me but flexible, resulting in an intermediate behavior. When the O,N,O' ligand with phenolate O coordinates a Sn(n-Bu)(2) fragment, a borderline situation occurs and both mono- and dinuclear complexes coexist in the same crystalline solid. The overall structural variety is reflected in a range of different Addison-tau(5) [Addison et al., J. Chem. Soc., Dalton Trans. 1984, 1349-1356] descriptors for five-fold coordination. For better comparability we introduce a slightly modified geometry index tau'(5), in which the basal angle alpha is subtended by the organic substituents, regardless of its absolute value. tau'(5) represents a sensitive indicator for the coordination geometry about Sn-IV. Tin NMR results revealed that all compounds exist as mononuclear pentacoordinated species in solution. (c) 2020 Elsevier B.V. All rights reserved.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of organometallic chemistry
ISSN
0022-328X
e-ISSN
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Volume of the periodical
927
Issue of the periodical within the volume
November
Country of publishing house
CH - SWITZERLAND
Number of pages
11
Pages from-to
"Article Number: 121522"
UT code for WoS article
000579416000011
EID of the result in the Scopus database
2-s2.0-85091078860