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Buckminsterfullerene is the most common naturally occurring fullerene. Small quantities of it can be found in soot. [5] [6] It also exists in space. Neutral C 60 has been observed in planetary nebulae [7] and several types of star. [8]
Scheme 1 presents an overview of the first step, the creation of a 13 membered ring orifice on the fullerene surface. A 1,2,4-triazine 2 is fitted with two phenyl groups and a pyridine group for reasons of solubility and reacted in 1,2-dichlorobenzene with pristine C 60 fullerene 2 in a Diels-Alder reaction at high temperature and for an extended reaction time.
Fullerene or C 60 is soccer-ball-shaped or I h with 12 pentagons and 20 hexagons. According to Euler's theorem these 12 pentagons are required for closure of the carbon network consisting of n hexagons and C 60 is the first stable fullerene because it is the smallest possible to obey this rule.
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Aces around, dix or double pinochles. Score points by trick-taking and also by forming combinations of cards into melds.
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