1,4,7-Triazacyclononane (tacn) with N,N'-bridging methylene-bis(phosphinic acid) group and its complexes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10432772" target="_blank" >RIV/00216208:11310/21:10432772 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9Mu-S-suUn" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=9Mu-S-suUn</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/zaac.202100107" target="_blank" >10.1002/zaac.202100107</a>
Alternative languages
Result language
angličtina
Original language name
1,4,7-Triazacyclononane (tacn) with N,N'-bridging methylene-bis(phosphinic acid) group and its complexes
Original language description
A bicyclic ligand, 1,4,7-triazacyclononane 1,4-bridged with methylene-bis(phosphinate) and bearing benzyl substituent on the remaining amino group, was synthesized from N-benzyl-tacn and CH2(PO2H2)(2) by two sequential Mannich-type reactions in a high yield. Basicity of the macrocycle is high (pK(1)=12.25). Complexes with Cu(II) and Ni(II) ions show dimeric structures in the solid state. The structures exhibit distorted octahedral environment with two ring amino groups from one molecule and two oxygen atoms of chelating bis(phosphinate) anion from the other molecule in the equatorial plane, and with the apical positions occupied by the remaining macrocycle amino group and by one of the phosphinate oxygen atoms. The metal ions in the dimers are additionally bridged by one phosphinate group. Stability of the Cu(II) complex is more than ten orders of magnitude lower than that of the [Cu(nota)](-) complex due to a different number and different nature of the pendant arms, and inappropriate arrangement of donor atoms in the ligand bicyclic structure. Rigidity of the short P-C-P chain of the geminal methylene-bis(phosphinate) does not allow simultaneous coordination of both phosphinate groups and the ring amines to the same metal ion. The low solubility of Ni(II) and Zn(II) complexes disabled determination of their stability constants.
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
<a href="/en/project/GA19-17380S" target="_blank" >GA19-17380S: Selective Metal Complexation by Polytopic Lligands: Towards Two-Metal Single-Molecule Probes for Biomedical Applications</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Zeitschrift für Anorganische und Allgemeine Chemie
ISSN
0044-2313
e-ISSN
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Volume of the periodical
647
Issue of the periodical within the volume
12
Country of publishing house
DE - GERMANY
Number of pages
8
Pages from-to
1261-1268
UT code for WoS article
000647884700001
EID of the result in the Scopus database
2-s2.0-85105396036