File talk:NH3-BF3-adduct-bond-lengthening-2D.png

Electron transfer between boron and nitrogen

The bond between boron and nitrogen is drawn as a normal covalent bond, together with a negative charge on the boron and a positive charge on the nitrogen. Now I am a bit puzzled. The charges are en:formal charges, right? Such charges are written with the symbols ⊕ and ⊖ in two chemistry books that I looked into. The boron still carries an actual positive charge δ+ and the nitrogen an actual negative charge δ- as far as I understand the electronegativities here. The bond between boron and nitrogen is also drawn with an arrow from nitrogen to boron in one of the books (Hollemann-Wiberg) that I checked instead of a solid line. I assume that the arrow should emphasize that the bond is a en:dipolar bond, meaning that the electron pair of the bond is only coming from the nitrogen. I'm not quite sure what notation is better/correct, and therefore I am asking. In my opinion I would tend to change the graphics. Are source files available for it, perhaps an SVG? --Uellue (talk) 13:23, 29 August 2012 (UTC)

I changed the symbols for the charges, it's now ⊕ and ⊖. --Uellue (talk) 17:53, 2 September 2012 (UTC)