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Bond Angles for molecules w/ multiple central atoms

Posted: Sun Nov 17, 2019 8:11 pm
by Lilyana Villa 1J
How do we determine the bond angles for molecules with more than 1 central atom? I know we are supposed to treat each central atom as its own but would the bond angles be the exact same as the general shape or...?

Re: Bond Angles for molecules w/ multiple central atoms

Posted: Sun Nov 17, 2019 8:17 pm
by Hannah Lee 2F
When there is more than 1 central atom, the bonding about each atom is treated independently, so the same rules for bond angles would apply. For instance, for ethylene (CH2=CH2), there are 3 regions of high e- density around each central atom, with 3 bonding pairs and 0 lone pairs. Therefore, the e- arrangement about each C atom and the molecular shape about each C atom would be trigonal planar, with bond angles of 120.