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Corona-condensation

The nomenclature applicable to cata-condensed (no atom is common to three or more rings) benzenoid (all carbon rings of size 6) molecules comprised of n rings, that are not also corona-condensed (forms a ring of rings) is one of simplicity and organization. Every member of this set has the same principal part in their name ... [Pg.67]

Fig. 34 Untwisted (corona-condensed) Isomer of Planar Moebiane... Fig. 34 Untwisted (corona-condensed) Isomer of Planar Moebiane...
A specification of the five addition modes is useful for some of the subsequent discussions and definitions. The modes can be vizualized as shown in Fig. 1 (i)-(v). An example of corona-condensation is included (vi) here the addition of a hexagon creates a corona hole. [Pg.68]

Fig. 1. Illustration of the five addition modes, (i)- (v), and an example of corona-condensation (vi). The added hexagons are grey. The pendent lines symbolize hexagons which may, but need not be present... Fig. 1. Illustration of the five addition modes, (i)- (v), and an example of corona-condensation (vi). The added hexagons are grey. The pendent lines symbolize hexagons which may, but need not be present...
All polyhexes with h + 1 hexagons can be generated by adding one hexagon to a perimeter (outer or inner) each time to all polyhexes with h hexagons according to the five addition modes or a corona-condensation. For simply connected polyhexes the five addition modes applied to the (only) perimeter are sufficient. [Pg.69]

Polansky and Rouvray (1976) started their series of pioneering papers, entitled "Graph-Theoretical Treatment of Aromatic Hydrocarbons", at a time when no coronoid hydrocarbon was known chemically. This fact did not prevent the authors to indude corona-condensed systems (coronoids) in their first paper in the series (Polansky and Rouvray... [Pg.1]

Definitions 8.1 A normal addition is an addition (of a hexagon) into the mode Li, L3 or L5. A regular addition is either a normal addition or a corona-condensation. [Pg.235]

It follows that any regular single coronoid can be built up by regular additions starting from benzene, whereby a corona-condensation should be executed only once. [Pg.253]

Step 2. A coronoid G2 is formed by a corona-condensation. One hexagon is added (into the mode L2 or A 2) so that a corona hole is created. [Pg.253]

Bergan JL, Cyvin BN, Cyvin SJ (1987) The Fibonacci Numbers, and Kekule Structures of Some Corona-Condensed Benzenoids (Corannulenes). Acta Clum Hung 124 299... [Pg.276]

Bergan JL, Cyvin SJ, Cyvin BN (1986) Number of Kekule Structures of Single-Chain Corona—Condensed Benzenoids (Cycloarenes). Chem Phys Letters 125 218... [Pg.276]

Polansky OE, Rouvray DH (1977) Graph-Theoretical Treatment of Aromatic Hydrocarbons III - Corona-Condensed Systems. Match 3 97... [Pg.290]

See other pages where Corona-condensation is mentioned: [Pg.159]    [Pg.70]    [Pg.427]    [Pg.161]    [Pg.178]    [Pg.178]    [Pg.180]    [Pg.208]    [Pg.3]    [Pg.32]   
See also in sourсe #XX -- [ Pg.235 ]



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