title: 6-Propylamino-2,6-propylepimino-2,4,4,8,8-pentakis(pyrrolidin-1-yl)-1,3,5,7,2lambda5,4lambda5,6lambda5,8lambda5-tetraazatetraphosphorocine.
abstract: The title compound, C(26)H(55)N(11)P(4), consists of a bicyclic phosphazene ring with five bulky pyrrolidino and one propylamino group, together with a second propylamino group bridging the two P atoms. The asymmetric unit contains two molecules with very similar conformations. The bulky substituents are instrumental in determining the bicyclic P(4)N(5) ring conformation. Each of the fused six-membered N(3)P(3) rings is in a sofa conformation. The P-N distances in the bridge are non-equivalent and one of them is the longest P-N bond in the molecule. The hybridization of the bridging N atom is pyramidal. The single and double P-N bonds cannot easily be distinguished, since they retain their phosphazenic character in the phosphazene macro-rings.
authors.affiliation: Department of Physics, Hacettepe University, 06532 Beytepe, Ankara, Turkey.
authors.forename: Levent
authors.initials: L
authors.lastname: Oztürk
authors.forename: Muhammed
authors.initials: M
authors.lastname: Isiklan
authors.forename: Zeynel
authors.initials: Z
authors.lastname: Kilic
authors.forename: Tuncer
authors.initials: T
authors.lastname: Hökelek
mesh_terms: D000970:Antineoplastic Agents / Q000737:chemistry*; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D011759:Pyrrolidines / Q000737:chemistry*
chemical_list: C454605:6-propylamino-2,6-propylepimino-2,4,4,8,8-pentakis(pyrrolidin-1-yl)-1,3,5,7,2lambda(5),4lambda(5),6lambda(5),8lambda(5)-teetraazatetraphosphorocine; D000970:Antineoplastic Agents; D019086:Bridged Bicyclo Compounds, Heterocyclic; D011759:Pyrrolidines