9C.5

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JamieVu_2C
Posts: 108
Joined: Thu Jul 25, 2019 12:16 am

9C.5

Postby JamieVu_2C » Thu Dec 05, 2019 2:48 am

Which of the following ligands can be polydentate? If the ligand can be polydentate, give the maximum number of places on
the ligand that can bind simultaneously to a single metal center:
(b) (CO3)2-
(d) oxalate

For (CO3)2-, all the 3 oxygen atoms have lone pairs, so why is the maximum number for the places that the ligand can bind to the metal atom only 2? And for oxalate, (C2O4)2-, there are 4 oxygen atoms with lone pairs, so why is the maximum number only 2 instead of 4?

Dakota Walker 1L
Posts: 58
Joined: Wed Sep 18, 2019 12:17 am

Re: 9C.5

Postby Dakota Walker 1L » Thu Dec 05, 2019 8:57 am

The rule is atom with lone pair - spacer atom - spacer atom - atom with lone pair. In CO3- this rule allows for only 2 bonds, and for C2O4, the same applies since you must have atoms in between.


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