- Crystal and Molecular Structures of Dimorpholinotetrasulphane
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The tetrasulphane S4(NC4H8O)2 crystallizes in the tetragonal space group I41/a (no. 88) with a=b=12.812(1), c=16.733(2) Angstroem, and Z=8.The structure has been determined by X-ray diffraction from Mo-Kα diffractometer data and refined by full-matrix least-squares to R 0.045 for 948 observed reflections.The molecules lie across crystallographic two-fold axes.The N-S-S-S-S-N chains occur in the trans-trans form, with N-S 1.668(3), S-S (terminal) 2.061(2), S-S (central) 2.078(3) Angstroem, N-S-S 109.1(2), S-S-S 105.8(1) deg, NSS-SSS 90.3. and SSS-SSS 79.9 deg.The morpholine groups occur in the chair form, with N-S equatorial.The S-S bonds alternate only slightly in length along the chain, like the Se-Se bonds in the isomorphous tetraselane analogue.
- Foss, Olav,Janickis, Vitalijus
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- INTERACTION OF THIOUREA WITH SULFUR DIVALENT COMPOUNDS: DESULFURIZATION OF THIOUREA BY N,N'-THIOBISMORPHOLINE
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The reaction of thiourea with several sulfur(II)-nitrogen compounds as well as thioethers and thiophenol have been investigated.At room temperature reaction of thiourea with N,N'-dithiobisamines afford compounds of composition H2N-C(S)-NH-S-S-NR2 while at high temperature sulfur and a complex mixture of S-N compounds are formed.N,N'-thiobismorpholine undergoes sulfuration with thiourea, to give N,N'-tetrathiomorpholine while from the reaction of N,N'-thiobis(piperidine) with thiourea the compound was identified.From the reaction of thiourea with sulfenamides, dithioethers and thiophenol the unaltered reactives were isolated.Key words: Thiourea reactions; thiobisamines reactivity; sulfur divalent.
- Diaz, C.,Bustos, O.,Yutronic, N.
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p. 207 - 214
(2007/10/02)
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- Process for the preparation of N-tetrathiodimorpholine
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There is disclosed a process for the preparation of N-tetrathiodimorpholine wherein an admixture of morpholine and elemental sulfur is oxidized with air or oxygen in the presence of iron salts and iron complexes to yield N-tetrathiodimorpholine.
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