β-Diketone interactions. Part 1. Pentane-2,4-dione–diethylamine adduct. X-Ray structure reveals novel hydrogen-bonded dimer
Abstract
When mixed, pentane-2,4-dione (PD) and diethylamine (DEA) produce unstable crystals of a 1 : 1 adduct which slowly condense with time to form 4-diethylaminopent-3-en-2-one. An X-ray crystal structure of the adduct shows it to be a dimer with alternate PD and DEA molecules held together by N–H ⋯O hydrogen bonds one of which is a three-centre hydrogen bond.