Voice-operated microcomputer-based laboratory data acquisition system to aid handicapped students in chemistry laboratories

further choice, the bridge with lowest locants will remain uncombined. (b) The expanded base cycle may have as ring units only monocyclic rings, or where they have trivial names allowed by Organic Rules A-21.3, A-23.1, B-2, or D-Table IV in footnote 1, polycyclic rings are permitted. (c) When a bridge is combined with another part of the structure, the ring with the least number of atoms will be the choice as a unit in the expanded base cycle unless the larger unit is part of a polycyclic ring having an allowed trivial name. In a choice between the rings of the same size, the more senior ring will be taken as part of the expanded base cycle. (d) Bridges will be combined with other parts of the structure in the following order: (1) bridges between atoms in the base cycle; (2) bridges between atoms within one bridge; (3) bridges between atoms in the base cycle and a ring unit of the expanded base cycle; (4) bridges between atoms in different ring units. The minimum number of bridges remaining after the above combinations have been carried out will be treated in the same way as substituents in forming the name of the macrocycle. A zero-atom bridge will be cited in the form PJ, where x and y are locants for the bridge. In the examples of cyclic structures containing bridges shown in Chart 11, the base cycle is shown in heavy lines; numbering is that of the system after bridge combinations have been made.