DESIGNATION OF ABSOLUTE CONFIGURATION OF MULTIHETEREOCYCLIC 9,13-DICHLORO-22,22-DIPYRROLIDINE-1-YL1H,2H,13H,19H-9,13-(EPIAZENOPHOSPHAZENO)-9λ5,11λ5,13λ5-[1,3,5,2,4] BENZOXADIAZADİPHOSPHONINO[4`,5`:2,3][1,3,2]DIAZAPHOSPHOLO[2,1-D] [1,3,5,2,4]BENZOXADIAZADIPHOSPHONINE BY X-RAY CRYSTALLOGRAPHIC DATA

Authors : Gamze ELMAS, Aytuğ OKUMUŞ, Satiye Sevim İSAOĞLU, Tuncer HÖKELEK, Zeynel KILIÇ

Pages : 15-30

View : 9 | Download : 5

Publication Date : 2019-12-31

Article Type : Research Paper

Abstract :The title compound, 9,13-dichloro-22,22-dipyrrolidine-1-yl-1H,2H,13H,19H-9,13-insert ignore into journalissuearticles values(epiazenophosphazeno);-9λ5,11λ5,13λ5-1,3,5,2,4]benzoxadiazadiphosphonino [4`,5`:2,3][1,3,2]diazaphospholo[2,1-d][1,3,5,2,4]benzoxadiazadiphosphonine; 2insert ignore into journalissuearticles values(C24H32Cl2N8O2P4);. 0.5 C6H12, a cyclotetraphosphazene derivative, has a geminaldipyrrolidino-2-trans-6-dichloro-ansa-spiro-ansa insert ignore into journalissuearticles values(gem-dipyrrolidino-2-trans-6-dichloroasa); structure in which the tricyclic parts are consisted of three eight-membered rings, containing a tetrameric N4P4 and two ansa rings. However, all these rings are not planar. The asymmetric unit contains two crystallographically independent molecules and one half of the cyclohexane solvent molecule. In both molecules, it is expected that two P insert ignore into journalissuearticles values(P1 and P3/P1′ and P3′); atoms are stereogenic centres. Both gem-dipyrrolidino-2-trans-6-dichloro-asa molecules have trans structures according to the Cl atoms, and they are in the racemic forms. Besides, it is found that the absolute configurations of P1, P3 and P1′, P3′ phosphorus centers are RR and SS, respectively. The title compound has P-1 space group, a Sohncke chiral space group, with the cell parameters of a = 9.6682insert ignore into journalissuearticles values(2);, b = 13.8587insert ignore into journalissuearticles values(3);, c = 24.0250insert ignore into journalissuearticles values(4); Å, � =105.249insert ignore into journalissuearticles values(2);°, � = 96.298insert ignore into journalissuearticles values(3);° and � = 98.367insert ignore into journalissuearticles values(3);°.
Keywords : Cyclotetraphosphazene, ansa spiro ansa Structure, Pyrrolidine, X ray crystallography