cisoidadj.
/ˈsɪsɔɪd/ Chemistry.
Designating a compound, group, or structure in which two like atoms or groups lie on the same side of a single bond or a line of bonds.
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cisoid1956
1956 L. F. Fieser & M. Fieser Org. Chem. (ed. 3) xii. 302 Various combinations of chair and boat cyclohexane rings make possible a number of conformations, each of which retains its cisoid or transoid character.
1968 Science 23 Feb. 836/2 The cisoid conformation.
1972 C. H. DePuy & O. L. Chapman Molecular Reactions & Photochem. iv. 59 1,3-Butadiene exists in solution as a rapidly equilibrating mixture of transoid and cisoid conformers, with the former predominating by nearly 20 : 1.
1984 N. N. Greenwood & A. Earnshaw Chem. of Elements (1986) xv. 857 The S4N4 retains the same conformation and almost the same dimensions as in the free molecule, with 2 of the 4 planar N atoms acting as a cisoid bridge.
This entry has not yet been fully updated (first published 1993; most recently modified version published online June 2018).
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adj.1956