A comparison of crystallographic and NMR data for thieno[2,3‐ b :4,5‐ b ′]dipyridine and its monohydroperchlorate salt | Zendy

Klemm Leroy H. | Zendy; Weakley Timothy J. R. | Zendy; Yoon Myungok | Zendy; Clegg Robert S. | Zendy

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A comparison of crystallographic and NMR data for thieno[2,3‐ b :4,5‐ b ′]dipyridine and its monohydroperchlorate salt

Author(s) -

Klemm Leroy H.,

Weakley Timothy J. R.,

Yoon Myungok,

Clegg Robert S.

Publication year - 2000

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.5570370416

Subject(s) - chemistry , salt (chemistry) , crystallography , stereochemistry

X‐ray crystallographic studies of thieno[2,3‐ b :4,5‐ b ′]dipyridine ( 1 ) and its monohydroperchlorate salt ( 1a ) show that 1 is protonated at N1 in ring A and not at N6 in ring C. In each compound individual rings are planar, but there is a small dihedral angle‐of‐twist between the A and C rings. On going from 1 to 1a the largest changes in bond angles and bond lengths occur in ring A. 1 H and l3 C nmr spectra of 1 plus the 13 C nmr spectrum of 1a are reported.

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