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Assignment of the 1 H‐ and 13 C‐NMR spectra of phenanthro[1,2‐ b ]thiophene through the concerted application of two‐dimensional NMR spectroscopic techniques
Author(s) -
Martin Gary E.,
Smith Stanford L.,
Layton W. John,
Willcott M. Robert,
Iwao Masatomo,
Lee Milton L.,
Castle Raymond N.
Publication year - 1983
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570200542
Subject(s) - homonuclear molecule , chemistry , heteronuclear molecule , spectroscopy , nuclear magnetic resonance spectroscopy , carbon 13 nmr satellite , nmr spectra database , chemical shift , two dimensional nuclear magnetic resonance spectroscopy , thiophene , spectral line , carbon 13 nmr , analytical chemistry (journal) , fluorine 19 nmr , stereochemistry , molecule , organic chemistry , physics , quantum mechanics , astronomy
Two‐dimensional nmr spectroscopy, by virtue of its second frequency domain which permits the segregation of spectral information along two frequency axes, considerably simplifies many assignment problems and facilitates others which may be impossible using conventional nmr methodology. A compound which falls into the latter category of assignment problem is phenanthro[1,2‐ b ]thiophene. The assignment of the 1 H‐ and 13 C‐nmr spectra of phenanthro[1,2‐ b ]thiophene are, however, reported through the concerted application of two‐dimensional nmr techniques. Experiments utilized in making the assignments included: auto‐correlated homonuclear (COSY) two‐dimensional spectroscopy; heteronuclear two‐dimensional J‐resolved spectroscopy; proton‐carbon chemical shift correlation two‐dimensional spectroscopy; and two‐dimensional 13 C‐ 13 C double quantum coherence spectroscopy.