135084-25-2Relevant academic research and scientific papers
SYNTHESIS AND DYNAMIC STEREOCHEMISTRY OF PHOSPHORANES
Povolotskii, M. I.,Negrebetskii, V. A.,Ruban, A. V.,Romanenko, V. D.,Chernega, A. N.,et al.
, p. 68 - 74 (2007/10/02)
phosphoranes in solutions show stereochemical flexibility, which arises from a process of degenerate Z,E isomerization relative to the P=C bond.The lowering of the barrier to rotation around
MOLECULAR STRUCTURE OF ?3λ5-IMINOMETHYLENEPHOSPHORANES
Chernega, A. N.,Rusanov, E. B.,Ruban, A. V.,Romanenko, V. D.
, p. 718 - 728 (2007/10/02)
We consider the x-ray structures of X-P (=NR)=CR21 (R = 2,4,6-Bu3t-C6H2, R1 = SiMe3, X = Ph(I), Mes(II), But(III), NMe2(IV), PBu2t(V), II-V reported in this paper) and use these to consider special features of ?3λ5-iminomethylenephosphoranes.The system of X-P(=N)=C bonds is planar within the range 0.04 Angstroem.The orientations of the X, R and R1 substituents relative to this plane in I-V differ considerably and are mainly determined by intramolecular steric interactions.The P=C double bond in I-V is "twisted".The dihedral angle φ between the XPNC and CSi2 planes varies between 6.6 and 43.5 deg but dP=C is independdent of φ.We found that, starting with trans or cis arrangements of XP=NR in λ3-iminophosphines, this configuration could be changed round when ?3λ5-phosphoranes were formed.
