Assembly of ethylzincate compounds into supramolecular structures

作者：Hedstrom Anna; Lennartson Anders^*

来源：Journal of Organometallic Chemistry, 2011, 696(10): 2269-2273.

DOI：10.1016/j.jorganchem.2010.12.001

• Organozinc
• Zincate
• Supramolecular chemistry
• Metallation
• Diethylzinc

Sodium and potassium triethylzincate were isolated by Wanklyn in 1858, and are corner stones in the history of organometallic chemistry. Crystallisation of organozincates from neat dialkylzinc, in the absence of a coordinating solvent, can be expected to result in assembly of supramolecular structures, rather than formation of discrete molecules in the crystalline state. This inspired us to reinvestigate Wanklyn's classical compounds. Crystallisation of sodium triethylzincate from benzene led to metallation of benzene and the formation of diethylphenylzincate anions. The compound is a two-dimensional network where Na+ ions link the zincate anions by coordination to both ethyl- and phenyl groups. We have also, accidently, isolated crystals of the two-dimensional coordination network [K-2(ZnEt2)(4)O](n), displaying a rare oxo-centred core with an octahedral oxide ion surrounded by four zinc atoms and two potassium atoms.

• 出版日期2011-5-15