Bis(thiourea)-1,4-diazabicyclo[2.2.2]octane. A new layered thiourea inclusion compound

Abstract

Thiourea reacts with 1,4-diazabicyclo[2.2.2]octane (DABCO) in methanol, leading to the layered inclusion compound (thiourea)₂·(DABCO). Single crystal X-ray diffraction analysis was carried out. The structure may be described as a supramolecular arrangement in which the DABCO molecules are intercalated in a layered network formed by two-dimensional nesting of thiourea molecules. The solid state ¹³C CP-MAS NMR study of the compound shows only a single line for C_α with a residual dipolar interaction between ¹³C and ¹⁴N of less than 80 Hz, attributed to weak guest–host interaction.