381245-98-3Relevant academic research and scientific papers
P - H-Functionalized 2-(Phosphanyl)ethanethiols, Their Titanocene Derivatives [Cp2Ti(SCH2CH2PHR)2] (R = Ph, 2,4,6-Me3C6H2, 2,4,6-iPr3C6H2) and Reaction of [Cp2Ti(SCH2CH2PHPh)2] with [Cu(CH3CN)4]BF4
Chaudhury, Satyajeet,Blaurock, Steffen,Hey-Hawkins, Evamarie
, p. 2587 - 2596 (2007/10/03)
The P - H-functionalized 2-(phosphanyl)ethanethiols RHPCH2CH2SH [R = Ph (1), 2,4,6-Me3C6H2 (Mes) (2), 2,4,6-iPr3C6H2 (Tipp) (3)] were prepared by ring cleavage of ethylene sulfide with LiPHR, followed by hydrolytic workup and distillation. 1-3 react with [Cp2TiCl2] in the presence of excess NEt3 to yield a diastereomeric mixture (ratio ca. 1:1) of rac- and meso-[Cp2Ti(SCH2CH2PHR)2] [R = Ph (4), Mes (5), Tipp (6)]. 6 is not obtained in pure form. Compound 4 reacts with [Cu(CH3CN)4]BF4 to yield [Cu{P,P'-PHPhCH2CH2SB(FH)SCH2CH2PPh(B-P)}2]BF4 (7). 1-7 were characterized spectroscopically. 7 exhibits dynamic behavior in solution, as shown by 31P NMR soectroscopy. Crystal structure determinations were carried out on 5 and 7. In 5, both diastereomers cocrystallize in the asymmetric unit. Although the cation of 7 has six chiral centers, only the (RP,RP,RP,RP,RB,RB)/SP,SP,SP,SP,SB,SB) diastereomer is present in the solid state.
