Synthesis and Crystal Structures of t‐Butyl‐Pyridine Adducts of ZnR₂ (R = Me, i‐Pr, t‐Bu, Cp*)

Abstract

Lewis acid-base adducts of the general type R 2 Zn(4-tBuPy) x (R = Me 1, iPr 2, tBu 3, Cp* 4; x = 1, 2) were obtained in high yields from reactions of ZnR 2 with the Lewis base 4-tBu-Pyridine. 83Compounds 1-4 were characterized by multinuclear NMR ( 1 H, 13 C) and IR spectroscopy and elemental analyses, 1 and 4 also by X-ray diffraction at single crystals.Scheme 2. Synthesis of Lewis acid-base adducts 1-4.

Organozinc Fluoride and Trifluoromethyl Compounds Supported by the Bis(2-pyridylthio)methyl Ligand

“…The fact that the Zn−CF 3 bond is longer than the Zn−CH 3 bond in [Bptm]ZnX is, nevertheless, supported by related studies on pyridine adducts, (py R ) 2 ZnX 2 . Thus, although the compounds possess different pyridine substituents, the Zn−CF 3 bond lengths in (py) 2 Zn-(CF 3 ) 2 19 are longer than the Zn−CH 3 bond lengths in (4-Bu t py) 2 ZnMe 2 63 and (4-Me 2 Npy) 2 ZnMe 2 . 64 For example, the average Zn−CF 3 bond length in (py) 2 Zn(CF 3 ) 2 is 0.064 Å longer than the average Zn−CH 3 bond length in (4-Bu t py) 2 ZnMe 2 .…”