The crystal structures of amarine (1) and isoamarine (2), important intermediates in the preparation of 1,2-diphenyl-diaminoethane, were successfully determined. Their allylation products, 1,3-diallyl amarine (1)(CH 2 CHCH 2 ) 2 Br (3) and isoamarine bromide (2)(CH 2 CHCH 2 ) 2 Br (4) [the crystal structures of (1)(CH 2 CHCH 2 ) 2 PF 6 (3-Br+PF 6 ) and (2)(CH 2 CHCH 2 ) 2 PF 6 (4-Br+PF 6 ) are also successfully determined to confirm allylation products], react with CuBr to afford (1) 2 (CH 2 CHCH 2 ) 4 (Cu 2 Br 4 ) (5) and (2)(CH 2 CHCH 2 ) 2 (Cu 2 Br 3 ) (6), respectively. Crystal structures of 5 and 6 reveal that 5 is an anion discrete complex without olefin moiety coordination, and 6 has a 1D infinite chain with olefin moiety coordination as a bridging spacer. The fluorescent emission spectra of 5 (λ emax =570nm) and 6 (λ emax =642nm) were measured, and display a significant difference that can be used for solid state fluorescent sensing them.