Crystal Structures of Two New Iodine Clusters: Tetranuclear [H2dabco](I4) (Dabco = 1,4-Diazabicyclo[2,2,2]octane) and Chained [Dedabco](I3)2 (Dedabco2+ = N,N′-Diethyl-1,4-Diazabicyclo[2,2,2]octane)

Abstract

At the ambient condition, the simple self-assembly between ZnI2, KI, and dabco in acidic H2O/C2H5OH solution produced a tetranuclear iodine cluster with diprotonated dabco as the cation [H2dabco](I4) (dabco = 1,4-diazabicyclo[2,2,2]octane) 1. But the same precursors reacted under the solvothermal condition, producing a chained iodine cluster polymer with dedabco2+ as the cation [dedabco](I3)2 (dedabco2+ = N,N′-diethyl-1,4-diazabicyclo[2,2,2]octane) 2. Note that dedabco2+ originated from the solvothermal in situ N-alkylation of dabco with C2H5OH solvent in acidic KI solution.