title: 1,1',4,5-Tetra-hydro-tri-spiro-[1,3,2-di-aza-phosphole-2,2'-[1,3,5,2,4,6]tri-aza-triphosphinine-4',6''-dibenzo[d,f][1,3,2]dioxaphosphepine-6',6'''-dibenzo[d,f][1,3,2]dioxaphosphepine] acetone monosolvate.
abstract: The title compound, C26H22N5O4P3·C3H6O, has been achieved in a two-step synthesis that does not require chromatography. This mol-ecule contains a seven-membered spiro-cyclic ring at two P-atom positions and a five-membered ring containing new P-N bonds at the other P-atom position. Endocyclic torsion angles about the central biphenyl C-C bonds are -41.5 (3) and -44.4 (3)°, and P-N bonds of the central P3N3 ring are within the range 1.5665 (17)-1.6171 (17) Å, while the P-O distances are in the range 1.5940 (14)-1.6041 (14) Å. One N-H group makes an inter-molecular N-H⋯N hydrogen bond, forming centrosymmetric dimers, while the other N-H group makes an N-H⋯O hydrogen bond to the acetone solvent mol-ecule. The crystal was a two-component non-merohedral twin with ratio 0.811/0.189.
authors.affiliation: United States Department of Agriculture Cotton Chemistry and Utilization, 1100 Robert E. Lee Blvd, New Orleans, LA 70124, USA.
authors.forename: Krystal R
authors.initials: KR
authors.lastname: Fontenot
authors.affiliation: United States Department of Agriculture Cotton Chemistry and Utilization, 1100 Robert E. Lee Blvd, New Orleans, LA 70124, USA.
authors.forename: Michael W
authors.initials: MW
authors.lastname: Easson
authors.affiliation: Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA.
authors.forename: Frank R
authors.initials: FR
authors.lastname: Fronczek
authors.affiliation: United States Department of Agriculture Cotton Chemistry and Utilization, 1100 Robert E. Lee Blvd, New Orleans, LA 70124, USA.
authors.forename: Brian D
authors.initials: BD
authors.lastname: Condon