rel-(1R,2S,3R,4S,5S,6R,7S,8R)-2,3,6,7-Tetrakis(chloromethyl)-1,4:5,8-diepoxy-1,2,3,4,5,6,7,8-octahydroanthracene

Crystal Structure of anti-1,4,5,8-Tetra-t-butyl-2,3,6,7-tetrahydro-1,4:5,8-diepoxyanthracene

“…The crystal structure of an analogous isomer having the same mother framework, although the molecule was substituted at the 2,3,6,7positions, had been determined previously. 6 The C-C bond length in the central phenyl ring is in the range 1.3865(14) -1.3985(14)Å, whose values are similar to those of the corresponding derivative (1.385 -1.395 Å). 6 In contrast, the single-bond lengths within the mother framework are somewhat different compared with the corresponding derivative.…”

“…6 The C-C bond length in the central phenyl ring is in the range 1.3865(14) -1.3985(14)Å, whose values are similar to those of the corresponding derivative (1.385 -1.395 Å). 6 In contrast, the single-bond lengths within the mother framework are somewhat different compared with the corresponding derivative. The C1-C6 and C4-C5 bond lengths [1.5268(14) and 1.5283 Å, respectively] are slightly longer compared with the corresponding C-C bonds 6 (1.517 and 1.505 Å, respectively).…”

“…In addition, the C1-O1 and C4-O1 bond lengths [1.4499(12) and 1.4506(12)Å, respectively] are also slightly longer than the corresponding C-O bonds 6 (1.439 and 1.450 Å, respectively). The C1-C2 and C3-C4 bond lengths [1.5604(14) and 1.5578(15)Å, respectively] are almost identical to the corresponding C-C bonds 6 (1.561 and 1.559 Å, respectively). However, the C2-C3 bond length [1.5359(16)Å] is slightly shorter than the corresponding C-C bond 6 (1.568 Å).…”

“…The C1-C2 and C3-C4 bond lengths [1.5604(14) and 1.5578(15)Å, respectively] are almost identical to the corresponding C-C bonds 6 (1.561 and 1.559 Å, respectively). However, the C2-C3 bond length [1.5359(16)Å] is slightly shorter than the corresponding C-C bond 6 (1.568 Å). The C1-O1-C4 bond angle [98.78(7)˚] is larger than the corresponding angle 6 (96.5˚).…”