title: 4-Chloro-7-hydr-oxy-6-methyl-1,7-naphthyridin-8(7H)-one.
abstract: The title compound, C(9)H(7)ClN(2)O(2), was prepared by reaction of methyl 4-chloro-3-(prop-1-yn-yl)picolinate with hydroxy-l-amine in MeOH/KOH solution. The two essentially planar mol-ecules which make up the asymmetric unit have almost identical geometries and and are linked into dimeric aggregates via pairs of O-H⋯O hydrogen bonds. These aggregates have almost perfect inversion symmetry; however, quite unusually, the inversion center of the dimer does not coincide with the crystallographic inversion center.
authors.forename: Kevin D
authors.initials: KD
authors.lastname: Bunker
authors.forename: Seiji
authors.initials: S
authors.lastname: Nukui
authors.forename: Arnold L
authors.initials: AL
authors.lastname: Rheingold
authors.forename: Antonio
authors.initials: A
authors.lastname: Dipasquale
authors.forename: Alex
authors.initials: A
authors.lastname: Yanovsky