✍ Scribed by Raymond M. Carman; Mary T. Fletcher; Lynette K. Lambert
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract The conformational behaviour of 6‐alkyl‐3‐oxo‐2‐oxabicyclo[3.3.0]octan‐7‐ols and some derivatives possessing the configurations a (6‐__endo__‐7‐__exo__), b (6‐__endo__‐7‐__endo__) and c (6‐__exo__‐7‐__endo__) is discussed. It is shown that an easy configurational assignment is possible
## Abstract Treatment of 2,2,4,4‐tetramethyl‐1,5‐diphenyl‐6,7‐dithiabicyclo[3.1.1]heptane 6‐endo‐oxide (2) with Montmorillonitc K 10 in dichloromethane gave 2,2,‐4,4‐tetramethyl‐1,5‐diphenyl‐7,8‐dithia‐6‐oxabicyclo‐[3.2.1]octane (6) (11%) with recovery of 2 (87%). Under similar reaction conditions,
## Abstract Spin–spin coupling constants between nuclei in NMR spectroscopy reflect their spatial arrangement. A number of calculation methods, applying different levels of theory, have been developed to support the stereochemical assignment of novel compounds. Nevertheless, revisions of the assign
Complete 13C NMR chemical shift assignments are reported for 32 cyclic and one acyclic 1.3-diketones, either unsubstituted or having one or two substituents at the 2-position. The first two classes exist exclusively in the enol form in (CD,),SO and as mixed tautomers in CDCI,.