It does not share carbon's proclivity for catenation, with the longest chain of nitrogen yet discovered being composed of only eight nitrogen atoms ( PhN = N N ( Ph ) N = N N ( Ph ) N = NPh ).
12.
Generally, with catenation comes the loss of the total amount of bonded hydrocarbons and an increase in the amount of energy required for bond cleavage due to strain exerted upon the molecule; in molecules such as cyclohexane, this is referred to as ring strain, and occurs due to the " destabilized " spatial electron configuration of the atom.
13.
For years, he had struggled to find a way to write f + g as in calculus, from the " scalar operators " in 1978, through the " til " operator in 1982, the catenation and reshape operators in 1984, the union and intersection operators in 1987, " yoke " in 1988, and finally forks in 1988.
