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Application of paramagnetic additions to the structure determination of some pyrazoles by nmr.

✍ Scribed by E.E. Zaev; V.K. Voronov; M.S. Shvartsberg; S.F. Vasilevsky; Yu.N. Molin; I.L. Kotljarevsky

Publisher
Elsevier Science
Year
1968
Tongue
French
Weight
289 KB
Volume
9
Category
Article
ISSN
0040-4039

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✦ Synopsis

Whep assiguing BMB lines of complex organic compounds there ofter occur some difficulties. The inclusion of an organic molecule in the first coordination sphere of a paramagnetic ion results in considerable changes in its B'MB spectrum.

These changes are due to additional local magnetic fields generated by the unpeired electrons of the central ion. Eaton (I) took adventage of EEB spectra peculiarities of paramagnetic complexes to measure spin-spin coupling constants in condensed aromatic and polyenic hydrocarbons, which were introduced as substitue ents to nitrogen atoms of Ei(II) aminotroponeimineate. At the semetime many organic substances (heterocyclic compounds, aminea, elcoholes, ethers etc.) sre capable of forming complexes with parsmagnetic salts directly. Kluiber snd Eorrocks

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