Table 1. Conformational Parameters of Thioamidesa.
compound | conformation | d (Å) | θ (deg) | Δ (Å) | Θ (deg) |
---|---|---|---|---|---|
4 | cis, endo | 4.6158(14) | 66.96(7) | 0.0035(14) | 0.43(17) |
5 | trans, endo | 3.2529(12) | 92.19(4) | 0.0237(8) | 2.61(9) |
6 | trans, endo | 3.4248(16) | 96.11(6) | 0.0243(17) | 2.70(19) |
6 | trans, exo | 3.2433(15) | 101.92(7) | 0.0392(16) | 4.36(18) |
From X-ray diffraction analysis of the crystalline compound. Parameters are defined in Figure 4.