التفاصيل البيبلوغرافية
| العنوان: |
Chloride ion-aided self-assembly of pseudoclathrochelate metal tris-pyrazoloximates. |
| المؤلفون: |
Varzatskii OA; Vernadskii Institute of General and Inorganic Chemistry of the National Academy of Sciences of Ukraine , 03680 Kyiv, Ukraine., Penkova LV, Kats SV, Dolganov AV, Vologzhanina AV, Pavlov AA, Novikov VV, Bogomyakov AS, Nemykin VN, Voloshin YZ |
| المصدر: |
Inorganic chemistry [Inorg Chem] 2014 Mar 17; Vol. 53 (6), pp. 3062-71. Date of Electronic Publication: 2014 Feb 21. |
| نوع المنشور: |
Journal Article |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: American Chemical Society Country of Publication: United States NLM ID: 0366543 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-510X (Electronic) Linking ISSN: 00201669 NLM ISO Abbreviation: Inorg Chem Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: |
Original Publication: [Easton, Pa.] American Chemical Society. |
| مستخلص: |
Chloride ion-aided one-pot template self-assembly of a mixed pyrazoloxime ligand with phenylboronic acid on a corresponding metal(II) ion as a matrix afforded the first boron-capped zinc, cobalt, iron, and manganese pseudoclathrochelate tris-pyrazoloximates. The presence of a pseudocross-linking hydrogen-bonded chloride ion is critical for their formation, as the same chloride-capped complexes were isolated even in the presence of large excesses of bromide and iodide ions. As revealed by X-ray diffraction, all complexes are capped with a chloride ion via three N-H···Cl hydrogen bonds that stabilize their pseudomacrobicyclic frameworks. The MN6 coordination polyhedra possess a distorted trigonal prismatic geometry, with the distortion angles φ between their nonequivalent N3 bases of approximately 0°. Temperature dependences of the effective magnetic moment for the paramagnetic complexes showed the encapsulated metal(II) ions to be in a high-spin state in the temperature range of 2-300 K. In the case of the iron(II) pseudoclathrochelate, density functional theory (DFT) and time-dependent DFT calculations were used to assess its spin state as well as the (57)Fe Mössbauer and UV-vis-NIR parameters. Cyclic voltammetry studies performed for these pseudomacrobicyclic complexes showed them to undergo irreversible or quasi-reversible metal-localized oxidations and reductions. As no changes are observed in the presence of a substantial excess of bromide ion, no anion-exchange reaction occurs, and thus the pseudoclathrochelates have a high affinity toward chloride anions in solution. |
| تواريخ الأحداث: |
Date Created: 20140225 Date Completed: 20150420 Latest Revision: 20140317 |
| رمز التحديث: |
20221213 |
| DOI: |
10.1021/ic4029047 |
| PMID: |
24559424 |
| قاعدة البيانات: |
MEDLINE |
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