(organic chemistry) Any cyclophane in which the para positions of a benzene ring are connected by a bridge of at least 10 atoms.

(chemistry) any polycyclic compound having the form of a cage

(chemistry) The simplest member of a class of compounds, from which the others are formally obtained by substituting radicals for hydrogen atoms.

(inorganic chemistry) Any compound not containing carbon atoms. / (inorganic chemistry) Any compound containing carbon atoms ionically bound to other atoms.

(inorganic chemistry) any solid material, composed of two or more metal atoms in a definite proportion, that has a definite structure which differs from those of its constituent metals

(chemistry) any compound having the general formula R-N₂⁺ X⁻, especially one in which R is an aryl residue; they are important as intermediates in the production of azo dyes

(chemistry) any compound of general formula RN=N-NR₂ where not all R = H

(chemistry) any compound of general formula R₂C=N⁺=N⁻

(chemistry) A chemical compound composed of only two elements. / (chemistry) A compound composed of an element and a radical (a group of atoms that behave as one piece).

(chemistry) any compound which contains more than eight formally assignable electrons in a valence shell directly associated with the central atom in direct bonding with a number of ligands