title: Investigations on the structure of 4-methyldihydro-1,3,4-benzotriazepin-5-ones. Tautomer reassignment.
abstract: The tautomerism of 4-methyldihydro-1,3,4-benzotriazepin-5-ones (2,3) is re-investigated by means of X-ray diffraction and quantum chemical calculations. The data revealed that the model compound (2a) exists in the amidrazone 1,4-dihydro tautomeric form (A), but not in the alternate 3,4-dihydro tautomer (B) as was previously reported.
authors.affiliation: Chemistry Department, Faculty of Science, University of Jordan, Amman, Jordan.
authors.forename: Jalal A
authors.initials: JA
authors.lastname: Zahra
authors.forename: Mustafa M
authors.initials: MM
authors.lastname: el-Abadelah
authors.forename: Musa Z
authors.initials: MZ
authors.lastname: Nazer
authors.forename: Kais A
authors.initials: KA
authors.lastname: Ebraheem
authors.forename: Roland
authors.initials: R
authors.lastname: Boese