Structures of inorganic rings as antitumor agents. I. Structure of the two allotropic varieties of 1,3,3,5,5-penta(1-aziridinyl)-1λ6,2,4,6,3,5-thiatriazadiphosphorine 1-oxide, (NPaz2)2-(NSOaz)

Abstract

The two allotropic varieties of the title compound N3P2SO(NC2H4) 5 have been studied; they are respectively named SOaz(I) and SOaz(II). SOaz(I) crystallizes in the orthorhombic system, space group P2~2~2~, with a -8.

Structure of the first genuine ansa derivative, N3P3Cl4[HN(CH2)2O(CH2)2NH]

“…The P-N bond lengths (Table 2) are homogeneous and equivalent to those already encountered in analogous compounds, 1.572 (2), 1.577 (2) and 1.602 (3),/k versus 1.553-1.609 and 1.558-1.608/~, respectively. In this case, the average value, 1 17.1 °, of the angles N-P-N is lower than the average 122.6 ° encountered in the compounds NaP3az4Cl 2 (Enjalbert, Guerch, Sournies, Labarre & Galy, 1983) and (NPaz2)2(NSOaz) (Galy, Enjalbert, van der Huizen, van de Grampel & Labarre, 1981). P-CI bonds.…”

Aziridinolysis patterns of (NPCl2)3 and (NPCl2)4; crystal structures of trans-N3P3(NC2H4)2Cl4 and 2,trans-4-N4P4(NC2H4)2Cl6

“…31P N.m.r. spectra also showed the presence of the other two isomers of N,P,(az),Cl,, (24) and (25). Whereas no detectable difference was found between reactions carried out in diethyl ether or benzene, notable changes were observed when using n-hexane.…”

“…The only argument for the structure assignment of (25) is that this isomer was prepared from 2,cis-4-N4P4(az),C1, (see Experimental section). Hence, assuming that no isomerization takes place, (25) should have the 2,cis-4,cis-6-structure. n.m.r.…”

Structures of inorganic rings as antitumor agents. IV. Structure of 1,3,3,5,5-pentakis(1-aziridinyl)-1λ6,2,4,6,3λ5,5λ5-thiatriazadiphosphorine 1-oxide monohydrate, C10H20N8OP2S.H2O

“…SOaz(II). The outstanding feature, emphasized by a s P(1) thorough crystallographic study (Galy, Enjalbert, van p(2) der Huizen, van de Grampel & Labarre, 1981), is the OA OB conformations adopted by this molecule which are quite w different for the unique molecule of SOaz(I) and for the N(1) two crystallographically independent molecules of N (2) N ( and z atomic coordinates fixed for one atom; anisotropic thermal parameters for all non-H atoms; H atoms in aziridinyl group positioned according to Dermer & Ham (1969), i.e. C-H=0.97A, H-C-H = 116 ° and isotropic thermal parameters U(Hi) = Ueq(Ci) + 0-015 A2; H atoms of the water molecule not included; 242 refined variable parameters.…”

“…The disorder could be related to this hydrogen-bonding interaction not adopting predominantly one arrangement or the other. Both A and B conformations of the SOaz(W) molecule can be directly compared with the previous one (Galy et al, 1981). Fig.…”