Conformational Difference between Mono- and Diprotonated cis-2, 5-Diphenylpiperazinium Salts in the Solid State

Kiyosei TAKASU; Hisashi MIYAMOTO; Kiyoshi TANAKA; Tohru TAGA; Masahiko BANDO; Kaoru FUJI

doi:10.1248/cpb.48.2014

Kiyosei TAKASU, Hisashi MIYAMOTO, Kiyoshi TANAKA, Tohru TAGA, Masahiko BANDO, Kaoru FUJI

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Keywords: piperazine, conformation, X-ray analysis, ^<15>N-NMR

JOURNAL FREE ACCESS

2000 Volume 48 Issue 12 Pages 2014-2016

DOI https://doi.org/10.1248/cpb.48.2014

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Abstract

Monohydrochlorides of cis-2, 5-diphenylpiperazine assume a chair conformation, while the corresponding dihydrochlorides assume a boat form regardless of the substituent(s) at the nitrogen atom.

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