Synthesis And Nuclear Magnetic Resonance Spectroscopy Of Geometrical Isomers Of 1,3,5-Trimethyl-2,4,6-tris(p-methylphenoxy)-2,4,6-trioxocyclotri-phosphazane: X-Ray Crystal Structure Of The Trans Isomer

Content Provider	Indian Institute of Science (IISc)
Author	Karthikeyan, Sakthivel Vyas, Krishnamurthi Krishnamurthy, Setharampattu S.
Copyright Year	1988
Abstract	Both cis and trans isomers of tri(N-methyl)tris(p-methylphenoxy)trioxocyclotriphosphazane,$N_3Me_3P_3O_3(OC_6H_4Me-p)_3$, have been prepared by the thermal rearrangement of the respective trimethoxycyclophosphazenes, $N_3P_3(OC_6H_4Me-p)_3(0Me)_3$. The crystal and molecular structure of the trans isomer has been determined; it crystallises in the P1 space group with a = 8.444(1), b = 11.753(1),c = 14.196(1)\AA,\alpha = 97.408(8), \beta = 92.487(10),\gamma = $102.325(10)^0$,andZ = 2.The structure has been solved by direct methods and refined to a R value of 0.060. The six-membered $N_3P_3$ phosphazane ring adopts a twist-boat confirmation. The structural data have been used to explain the n.m.r. spectroscopic features. A chair conformation is proposed for cis- $N_3Me_3P_3O_3-(OC_6H_4Me-p)_3$ on the basis of n.m.r. data.
File Format	PDF
Journal	PeerReviewed
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	1988-01-01
Access Restriction	Authorized
Subject Keyword	Inorganic & Physical Chemistry
Content Type	Text
Resource Type	Article