Preparation and crystal structures of two phosphorus–sulphur rings: (PhP)₃S₃and (PhP)₂S₄

5-Methyl-2,8-dithia-1,3,7-triphosphatricyclo[3.3.1.03,7]nonane 1-sulfide

“…The values obtained [2.10A (mean)] are insignificantly shorter and agree with bond lengths in similar structures (Vos et al, 1965;Lensch, Clegg & Sheldrick, 1984). The P=S bond [P(1)=S(1): 1.931 (1)AI is also comparable with literature data (Vos et al, 1965;Lensch et al, 1984).…”

Organo–Phosphorus–Sulfur Heterocycles by Reactions of Phenylphosphine with Ketones

“…The crystals were isolated from CHCl 3 at −20 • C, displaying the structure of (2) as already published in the literature. 4 The addition of acetone to compound (2) leads to high yields of a mixture of (1a,Z)/(1b,E) ( Figure 1). 31 P-NMR studies showed that the relative integrals between (1a,Z) and (1b,E) were found to be approx.…”

“…The endocyclic bond length of P S is 2.1225 Å, which is also shorter than the P Se length ( 97.23(4) C10-P2-S1 108.34(4) P1-S1-P2 95.899(17) S1-P2-O1 100.33 (4) Comparison of the bond angles of the heterocycle (1a,Z) with the selenium compound shows that the C(Me) 2 is out of the plane in both structures. Values of compound (1a,Z) are for P2 O1 C1 120.37 • and for S1 P1 C1 97.23 • ( Table 2).…”

Sulfur: Inorganic Chemistry

“…In comparison it is worth noting that use of a simple phenyl group allows formation of a five-membered ring with adjacent PPh groups and an exocyclic sulfur. 157 This five-membered ring readily reacts with sulfur to give (PhPS 2 ) 2 .…”