Tricarbonylchromium(0) complexes of 1,3,5-triphenylbenzene: an X-ray crystallographic and high field NMR spectroscopic study

The reaction of 1,3,5-triphenylbenzene (TPB) with Cr(CO)6 yields products in which a Cr(CO)3 moiety is bonded to the central ring or to one, two or all three peripheral phenyl rings. The structure of the TPB · 3Cr(CO)3 complex has been determined by single crystal X-ray diffraction techniques. The complex crystallizes in the space group P21/n with unit cell parameters a 8.316(2) Å, b 15.498(5) Å, c 22.254(4) Å, β 92.18(2)°, V 2865.8(11) Å3 and …