2. Parts : Aromatic




Aromatic part has 3 bonds each extending in 3 directions on a plane. One of them is Hornshapes, working as male (+) for connection, and the other two work as female (-) using the holes.

Female bonds can be turned into male by inserting Connector DRG-20 to the holes.

·Benzene ring : insert a male bond into female and connect 6 aromatic parts one to another. Then a benzene ring will be formed.

·Double bonding: When Carbon aromatic are duble bonded, their rotation must be restricted. In this case, put ORG-21Double bond lock between Carbon atoms connection, so that small protrusions on the bonds fit into the cut-outs of the Locking double bond.(Fig-2)

·Oxygen single bond 120: This part becomes necessary for phosphate ester & when purine ring and pyrimidine ring are hydrogen bonded. In such a case, ORG-7 sp2 (aromatic oxygen) can be used after cutting off one female bond at its root with nippers etc. (Fig-3)
Fig. 2 Ethylene chloride


Fig. 3 Oxygen Single Bond 120


Fig. 4 Phosphate group

Item No. Name Bond
Iength		 Bond
Arrange-
ment		 Color Angle Shape
ORG-5 sp2 Carbon 0.70 Black 120
*ORG-6 sp2
(aromatic nitrogen)		 0.70 Blue 120
*ORG-7 sp2
(aromatic oxygen)		 0.70 Red 120
ORG-21 Double bond lock Trans-
Parent
*Not included in SET



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HGS Molecular Structure Model

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