Janaswamy Srinivas

G. Sreenivasa Murthy

Talla Venkata Rama Mohan

Fulltext

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Zeitschrift fur Kristallographie - New Crystal Structures

The title compound (NC4H8NCH3)(C 6H5)[N(C6H11)2]P=N-S 3N3 crystallizes in the triclinic crystal system with unit cell dimensions: a = 9.7572(2), b = 10.6845(1), c = 16.9381(3) Å, α = 71.75(1)°, β = 80.65(2)°, γ = 65.93(1)°, and Z = 2. The tricoordinated sulfur atom (S1) in the cyclotrithiazene deviates from the mean plane of the other five atoms by 0.716(6) Å, which is the highest among the known phosphiniminocyclotrithiazene structures. In the exocyclic P=N4-S1 moiety, the two bond distances are short: 1.585(6) and 1.527(6) Å; but the bond angle is large 135.3(4)°. The S1 displacement is highly correlated with the endocyclic angle at the nitrogen atom (diagonally opposite to S1), but the nature of correlation is bimodal (R = 1.0 + or -1.0) for the cyclic and acyclic substituents (R) in the (R)(C6H 5)[N(C6H11)2]P=N-S3N 3 series. On the other hand, the S1-N4 bond distances are negatively correlated (R = -0.94) with the P=N4-S1 bond angle in the above series. © 2005 Springer Science+Business Media, Inc.

Journal of Chemical Crystallography

Crystal structure analysis of (N-methyl piperazino) (phenyl) (dicyclohexylamino) phosphiniminocyclotrithiazene

The title compound (C6H5)(C4H8NO)[N(C6H 11)2]P=N-S3N3 crystallizes in a triclinic crystal system with unit cell parameters a = 9.8884(4) Å, b = 10.6075(1) Å, c = 14.2276(2) Å, α = 78.14(3)°, β = 79.31(1)°, γ = 65.42(2)°, V = 1319.44(6) Å3, Z = 2, and space group P1̄. The cyclotrithiazene ring adopts a "distorted chair" conformation with a deviation of 0.682(7) Å for the tricoordinated sulfur atom. Remarkably, a short exocyclic S-N bond length 1.489(4) Å along with a large P-N-S angle 136.2(3)° are observed with the iminophosphorus moiety. © 2003 MAIK "Nauka/Interperiodica".

Crystallography Reports

Crystal structure analysis of (morpholino)(phenyl)(dicyclohexylamino) phosphiniminocyclotrithiazene

The title compound (OC4H8N)3P=N-S3N3 crystallizes in a monoclinic crystal system with unit cell parameters a = 8.9996(3), b = 17.2895(7), and c = 12.3648(9) Å, β = 90.63(5)°, Z = 4, and space group P21/n. Strikingly the exocylic S1-N4 bond length is 1.545(3) Å and is accompanied by the largest angle at P-N4-S1 as 131.2(2)°. The tricoordinated sulfur atom of the cyclotrithiazene ring deviates from the mean plane of other five atoms by 0.654(1) Å.

Crystal structure of trismorpholino phosphiniminocyclotrithiazene

Crystal structure of (phenyl) (piperidino) (dicyclohexylamino)-phoshiniminocyclotrithiazene dichloromethane hemisolvate, ((C6H5)N(C6H11)2)(C5H10)PN(S3N3))2(CH2Cl2)

Journal	Zeitschrift fur Kristallographie - New Crystal Structures
ISSN	14337266
Open Access	Yes