macrocycle

Noun

Meaning

(chemistry) a cyclic macromolecule, or a macrocyclic portion of a molecule

In sports training, an annual plan that works towards peaking for the goal competition of the year.

Examples

If the end groups of the dumbbell are an appropriate size it will be able to reversibly thread through the macrocycle at higher temperatures. Source: Internet

The macrocycle can rotate around the axis of the dumbbell like a wheel and axle or it can slide along its axis from one site to another. Source: Internet

Controlling the position of the macrocycle allows the rotaxane to function as molecular switch with each possible location of the macrocycle corresponding to a different state. Source: Internet

Heme is a good example: the iron atom is at the centre of a porphyrin macrocycle, being bound to four nitrogen atoms of the tetrapyrrole macrocycle. Source: Internet

The partial macrocycle then undergoes a ring closing reaction around the dumbbell-shaped molecule, forming the rotaxane. Source: Internet

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