title: 5-Benzyl-2-phenyl-6,8-dihydro-5H-1,2,4-triazolo[3,4-c][1,4]oxazin-2-ium hexa-fluoridophosphate.
abstract: The title compound, C(18)H(18)N(3)O(+)·PF(6) (-), is a chiral bicyclic 1,2,4-triazolium salt which contains four rings, viz. a triazolium, a morpholine and two phenyl rings. Analysis of bond lengths shows that the N-CH-N group in the triazolium ring conforms to a typical three-center/four-electron bond (also known as the Pimentel-Rundle three-center model). The structure is completed by a disordered PF(6) (-) counter-ion [occupancies of F atoms 0.678 (8):0.322 (8)], which inter-acts with the main mol-ecule through weak inter-molecular P-F⋯π inter-actions.
authors.forename: Yumin
authors.initials: Y
authors.lastname: Huang
authors.forename: Siping
authors.initials: S
authors.lastname: Wei
authors.forename: Zhen
authors.initials: Z
authors.lastname: Wang
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Mao
authors.forename: Xiaoyu
authors.initials: X
authors.lastname: Su