Sayil, C.; Ibis, C. Synthesis and Crystal Structures of 4,4-Dichloro-2-Nitro-1,1,3-tris(phenylsulfanyl)-Buta-1,3-Diene and 4,4-Dichloro-2-Nitro-1,1-bis(phenylsulfanyl)-3-(phenylsulfinyl)-Buta-1,3-Diene. ajc 2013, 25, 8093-8096.