title: (E)-tert-Butyl 4-(N'-hy-droxy-carbam--imid-o-yl)piperazine-1-carboxyl-ate.
abstract: In the title compound, C10H20N4O3, the piperazine ring adopts a chair conformation. The mol-ecule adopts an E conformation across the C=N double bond, with the -OH group and the piperazine ring trans to one another. Further, the H atom of the hy-droxy group is directed away from the NH2 group. An intra-molecular N-H⋯O contact occurs involving the NH2 group and the oxime O atom. In the crystal, mol-ecules are linked via strong N-H⋯O and O-H⋯N hydrogen bonds with alternating R2(2)(6) and C(9) motifs into tetra-meric units forming R4(4)(28) motifs.
authors.affiliation: Department of Studies and Research in Chemistry, Tumkur University, Tumkur, Karnataka 572 103, India.
authors.forename: S
authors.initials: S
authors.lastname: Sreenivasa
authors.forename: K E
authors.initials: KE
authors.lastname: Manojkumar
authors.forename: P A
authors.initials: PA
authors.lastname: Suchetan
authors.forename: N R
authors.initials: NR
authors.lastname: Mohan
authors.forename: B S
authors.initials: BS
authors.lastname: Palakshamurthy