title: Difurazano[3,4-b:3',4'-f]-4,5-diaza-1,8-dioxacyclododecine and an acyclic analogue.
abstract: The novel title furazan-containing macrocycle (systematic name: 6,9,14,17-tetraoxa-2,3,5,7,16,18-hexaazatricyclo[13.3.0.0(4,8)]octadeca-4,7,15,18-tetraene), C8H10N6O4, (I), is the first macrocycle where the furazan rings are connected via a hydrazine group. In spite of the strain in the 12-membered macrocycle of (I), the geometry of the furazan fragment is the same in (I) and in its acyclic analogue 1,8-bis(5-aminofurazan-4-yloxy)-3,6-dioxaoctane, C10H16N6O6, (II). In both compounds, the participation of the furazan rings in intermolecular hydrogen bonding equalizes the N-O bonds within the furazan rings, in contrast with rings which do not participate in such interactions.
authors.affiliation: Department of Chemistry, New Mexico Highlands University, Las Vegas 87701, USA. averkiev75@yahoo.com
authors.forename: Boris B
authors.initials: BB
authors.lastname: Averkiev
authors.forename: Tatiana V
authors.initials: TV
authors.lastname: Timofeeva
authors.forename: Aleksey B
authors.initials: AB
authors.lastname: Sheremetev
authors.forename: Elena V
authors.initials: EV
authors.lastname: Shatunova
authors.forename: Mikhail Yu
authors.initials: MY
authors.lastname: Antipin