15-06-2017 дата публикации
Номер: US20170169731A1
Принадлежит:
A chirality teaching tool includes a central sphere representing a chiral carbon atom, and four projections representing substituents bound to the chiral carbon atom. The central sphere includes two hemispheres rotatable relative to each other. Each of the four projections forms an angle of about to about degrees with each other projection on the same hemisphere, and each projection is capable of forming an angle of about to about degrees with each of the two projections on the other hemisphere. A message indicating the type of chirality (e.g., “R” or “S”) is visible from outside the central sphere and displayed on or below the outer surface of the central sphere. The message changes when relative locations of two of the four projections are exchanged by the rotation of the two hemispheres degrees relative to each other. 11. A chirality teaching tool [] , comprising:{'b': 10', '12', '14', '16, '(a) a central sphere [] comprising an outer surface [] and two hemispheres [, ] rotatable relative to each other;'}{'b': 20', '20', '12', '14', '16', '22', '24', '12', '20', '12', '18', '22', '24', '20', '20, "(b) four projections [], two of the four projections [] projecting from the outer surface [] of each of the two hemispheres [, ], each projection having a central axis [], the central axis having a point of contact [] with the outer surface [], each projection [] extending linearly from the outer surface [] and perpendicular to a plane [] tangent to its central axis's [] point of contact [], each projection forming an angle of about 100 to about 120 degrees with the other projection [] on the same hemisphere, and each projection being capable of forming an angle of about 100 to about 120 degrees with each of the two projections [] on the other hemisphere; and"}{'b': 30', '10', '12', '10', '34', '12', '24', '22', '20, '(c) a message [] visible from outside the central sphere [] and displayed on or below the outer surface [] of the central sphere [], the message residing ...
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