153287-35-5Relevant academic research and scientific papers
Synthesis and Crystal Structures of the Tungsten(VI) Alkyne Complexes C-I)(THF)> and C-Te-C4H9)(THF)>
Plate, Michael,Hofacker, Peter,Massa, Werner,Schwarz, Birgit,Neumueller, Bernhard,Dehnicke, Kurt
, p. 1105 - 1111 (2007/10/02)
C-I)(THF) has been prepared by the reaction of trans- with Ph-CC-I in THF solution, whereas C-Te-nC4H9)(THF)> has been synthesized by the reaction of Ph-CC-Te-nC4H9 with tungsten hexachloride in the presence of C2Cl4 and THF.Both complexes were characterized by IR spectroscopy and by crystal structure determinations. C-I)(THF): Space group P21/c, Z = 4, 2617 observed unique reflections, R = 0.064.Lattice dimensions at -70 deg C: a = 1518.2(3), b = 714.5(1), c = 1540.0(3) pm, β = 90.09(3) deg. C-Te-nC4H9)(THF).Space group P, Z = 2, 3911 observed unique reflections, R = 0.067.Lattice dimensions at 20 deg C: a = 844.0(3), b = 974.6(4), c = 1002.4(3) pm, α = 76.00(4), β = 105.14(1), γ = 82.03(3) deg.Both complexes have molecular structures, in which the tungsten atoms are seven-coordinate by four chlorine ligands, by the two alkyne carbon atoms, and in trans position to the latter by the oxygen atom of the THF molecule.The WC bond lengths are 198 and 200(1) in the telluro complex and 206 and 196(1) pm in the iodine derivative.
