Structure of and energy calculations for 1,2,9,10,17,18-hexadehydro[2.2.2]paracyclophane

Structure of the 1/1 complexes of [2.2.2]paracyclophanetriene and [2.2]paracyclophane with tetracyanoethylene

“…In particular, the phenyl rings are not perpendicular to the reference plane defined by their centres of gravity. This was already observed in [23]paracyclophanetriene (Trueblood et al, 1982). In complex (II) (Fig.…”

“…In contrast, they were found to be disordered in the crystal structures of [23]paracyclophanetriene and [22]paracyclophane (Trueblood et al, 1982;Hope et al, 1972).…”

2,2′-[(Biphenyl-4,4′-diyl)di(ethene-1,2-diyl)]dibenzenesulfonic acid–4-methylpiperidine–water (1/2/2)

“…1 has an inversion centre lied on the midpoint of the C-C bond between the inner benzene rings. The C7-C8 bond length of 1.326 (5)Å is comparable with C-C double bond [1.336 (2) Å]reported (Trueblood et al,1982). (Table 1).…”

“…For the optical properties of ethylene biphenyls, see: Song et al (2003). For comparative bond lengths, see: Trueblood et al (1982). independent and constrained refinement Á max = 0.34 e Å À3 Á min = À0.27 e Å À3 Table 1 Hydrogen-bond geometry (Å , ).…”

4,4′-Bis(2-methoxylstyryl)biphenyl

“…For the optical properties of ethylene biphenyls, see: Song et al (2003). For comparative bond lengths, see: Trueblood et al (1982).…”