The crystal and molecular structure of 4,4'-diamino-3,3'-dichlorobiphenyl

4-Bromobiphenyl; an ordered crystal with a structure similar to that of biphenyl

“…The three angles in 1,3,5-triphenylbenzene are also in this range (Lin & Williams, 1975), as is the angle in 4,4'-diamino-3,3'-dimethylbiphenyl (Chawdhury, Hargreaves & Sullivan, 1968). The 4-nitro- (Casalone, Gavezzotti & Simonetta, 1973) and 4,4'-dinitrobiphenyl (Boonstra, 1963) derivatives have somewhat smaller angles of 33 o, and in 4,4'-diamino-3,3'-dichlorobiphenyl (Chawdhury, Hargreaves & Rizvi, 1968) the value is 21 °. At the other end of the scale are a number of biphenyl derivatives which, like unsubstituted C~2H~0 (Hargreaves & Rizvi, 1962), crystallize with the molecules located at centers of symmetry.…”

Molecular and crystal structure of an amphiphile: 4′-propoxybiphenyl-4-methyl-N,N-dimethylamineoxide dihydrate

“…Biphenyl was found planar [20,[23][24][25] in spite of the steric strain, while substituted biphenyls showed twist angles between 21 ° and 54 ° [26][27][28][29][30][31][32].…”

3,3′-Dichlorobiphenyl-4,4′-diaminium sulfate

“…For related compounds, see: Chawdhury et al (1968); Chu et al (2007); Dobrzycki & Wozniak (2007); You et al (2009 Table 1 Hydrogen-bond geometry (Å , ). Symmetry codes: (i) Àx þ 1; Ày þ 1; Àz; (ii) x þ 1; y; z; (iii) Àx þ 1; Ày; Àz þ 1; (iv) x; y; z þ 1; (v) x þ 1; y; z þ 1.…”

“…There have been two single-crystal structural investigations on 4,4'-diamino-3,3'-dichlorobiphenyl, namely 4,4'-diamino-3,3'-dichlorobiphenyl (Chawdhury et al, 1968) and 4,4'-Diammonio-3,3'-dichlorobiphenyl dichloride (Dobrzycki & Wozniak, 2007). We have previously reported the single-crystal structures of 2-aminobenzimidazolium hydrogen sulfate (You et al, 2009) and (1R,3S)-1,2,2-trimethylcyclopentane-1,3-diammonium sulfate (Chu et al, 2007).…”