# Does the Location of Line-Dash-Wedge Notations Matter? Tags: organic-chemistry, bond, stereochemistry, notation - Score: 8 - Views: 2397 - Answers: 1 - Answered: yes - Asked by: Westin Johnson (89 rep) - Asked: 2019-03-23 - Edited: 2019-03-23 - Site: chemistry ## Question In Line-Dash-Wedge notation, when illustrating that an atom or bond is directed towards or away from the viewer (solid triangle for coming forward, dotted lines for going back), does the location of these lines matter when doing illustrations? For example, a THC molecule. The two hydrogen atoms there. Could they be placed inside the carbon rings instead of appearing outside, like below? I understand that there's a whole host of issues with that otherwise, but just asking about the triangle and dashes in particular. ## Answers ### Answer by andselisk (score: 11) Yes, both inner and outer placements are possible with some nuances. From Graphical representation of stereochemical configuration (IUPAC Recommendations 2006) [1, p. 1926]: ST-1.3.2: Stereogenic centers at ring fusion atoms Stereogenic centers at ring fusion atoms should be drawn with hashed wedged or solid wedged bonds to the exocyclic s