20265-31-0Relevant academic research and scientific papers
Structural Investigations of the Organoantimony(V) Halides Ph4SbX and Ph3SbX2 (X = Cl, Br or I) in the Solid State and in Solution
Baker, Lisa-Jane,Rickard, Clifton E. F.,Taylor, Michael J.
, p. 2895 - 2900 (1995)
X-Ray crystallography revealed a distorted trigonal-bipyramidal structure for Ph4SbI, with Sb-Cax 2.141(3), Sb-Ceq 2.103(3)-2.117(3) Angstroem and a long Sb-I distance of 3.341(1) Angstroem in monoclinic crystals of P21/n symmetry.Consideration of the weak Sb-X bonds in Ph4SbX (X = Cl, Br or I) leads to reassignment of their Raman spectra; Ph4SbI ionises forming (1+) in acetonitrile, as shown by 13C and 121Sb NMR spectra.The halide Ph3SbI2 is reported in two phases, yellow, orthorombic (Fdd2) crystals isomorphous with Ph3SbBr2 and off-white, cubic (P4332) crystals.In each the molecule is trigonal-bipyramidal, with axial Sb-I bonds of 2.865(1) Angstroem in the former and 2.885(1) Angstroem in the latter, and small differences in their respective bond angles.The phenyl groups of the cubic form are in the regular propeller arrangement whereas one group of the orthorhombic form has a reversed orientation.The vibrational spectra of the two forms differ slightly.
Solid-state Structures of Triarylantimony Dihalides; the Isolation of Some Mixed-halide Species and Crystal Structures of Ph3SbI2 and I3
Bricklebank, Neil,Godfrey, Stephen M.,Lane, Helen P.,McAuliffe, Charles A.,Pritchard, Robin G.
, p. 1759 - 1764 (2007/10/02)
Fifteen compounds of stoichiometry R3SbX2 (R = Ph or substituted aryl; X2 = Br2, I2 or IBr) were synthesized and studied by Raman spectroscopy.The crystal structure of Ph3SbI2 has been determined, which shows it to be a distorted trigonal-bipyramidal molecule.The distortion from regular trigonal-bipyramidal geometry may be explained by a pseudorotation process towards a rectangular pyramid.Moreover, there are two independent molecules within the unit cell and its distorted structure is in direct contrast to the known Ph3SbX2 (X = Cl or Br) which both adopt regular trigonal-bipyramidal geometry.The interhalogen compounds R3SbIBr also have trigonal-bipyramidal geometry.In direct contrast to the molecules Ph3El2 (E = P or As), which ionise in solution to form I, Ph3SbI2 is chemically changed in acetonitrile solution and forms the ionic I3, there being no evidence for I.The crystal structure of I3 has also been determined.
