SHAPES OF MOLECULES & IONS

[@thriller2789]

This summarizes basically everything, and is very helpful

[@raymondwilson2933]

Excellent video. Might be useful to mention octet expansion for PCl5 and SF6

[@MaChemGuy]

Thanks - I cover that in my covalent bonding videos earlier on in the topic. In hindsight, wish I'd made a quick reference to it though

[@PamelaPato-p7e]

Absolutely helpful , god bless you for saving me

[@ZaynMohammed-fi8qp]

thank you so much you made the whole thing seem so simple :)

[@mikeywinstone8525]

Thanks for this video sir. Very helpful

[@rosaalnds]

hi in the textbook it shows a 109.5 angle between the dotted wedge of H and the bold wedge of H in methane and not between C and H. would either be right ?

[@MaChemGuy]

All the angles are the same in a tetrahedral arrangement

[@fromjessica3009]

Hi Sir, in other resources it says the bond angle of SO2 is 120 degrees no 117.5 degrees. I'm quite confused about this

[@MaChemGuy]

Hi there. As I’m sure you know, SO2 has 3 electron regions in the valence shell, 2 bonding regions (both double bonds) and 1 lone pair. The OCR specification allows treating multiple bones to be equivalent to single bonds in terms of repulsion which is where the 117.5 degrees comes from (120-2.5 from the extra repulsion from the lone pair) I’ve looked online and have seen that this is not strictly true due to extra repulsion from double bonds. I’ve seen angles of 120 and 119 from different sources. For the purposes of A level which is often simplified I’d still advise giving an angle of 117.5. Hope that helps.

[@engineeringmadeasy]

@@MaChemGuy Reading your reply saved my time.

[@galaxyswrld9414]

Sir how would you know that the hydrogens are in the flat plane and that the lone pairs are in the above and lower planes, instead of vice versa? 21:36

[@MaChemGuy]

I just chose those positions to make it easier to visualise

[@user-kx6sl2sr7u]

Are you expected to know where it is double bonded