Nitrogen Lewis base adducts of group 12 alkyls: Molecular structure of poly[1,3-bis (4-pyridyl) propane]dimethylzinc, [Me2Zn (C5H4N)CH2CH2CH2(C5H4N)]n

✍ Scribed by Nigel L. Pickett; Philip Lightfoot; David J. Cole-Hamilton

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 513 KB
• Volume: 7
• Category: Article
• ISSN: 1616-301X
• DOI: 10.1002/(sici)1099-0712(199701)7:1<23::aid-amo244>3.0.co;2-x

✦ Synopsis

The structure of the dimethylzinc adduct with the bidentate amine 1,3-bis(4-pyridyl)propane, [Me 2 Zn(C 5 H 4 N)CH 2 CH 2 CH 2 (C 5 H 4 N)]n, 1, has been determined by X-ray diffraction analysis. Crystals of 1 are monoclinic, space group P2 1 m, with two molecules within a unit cell of dimensions a = 5.364(3) A, b = 12.839(3) A, c = 10.618(3) A and β = 92.76(3)°. The structure is polymeric, being composed of [Me 2 Zn(C 5 H 4 N)CH 2 CH 2 CH 2 (C 5 H 4 N)] units with the nitrogens within a specific 1,3-bis(4-pyridyl)propane ligand bonding to adjacent zinc centres. The zinc atom is four-co-ordinate, bonding to two carbon and two nitrogen atoms, with the C Zn C angle of 145.5(2)° intermediate between that of a linear and tetrahedral bond arrangement. As far as we know, this is the first example of a polymeric alkyl zinc cadmium amine adduct to have been structurally characterised.