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Cristian Carrasco 1F
Posts: 52
Joined: Fri Sep 29, 2017 7:06 am


Postby Cristian Carrasco 1F » Sat Dec 09, 2017 12:05 am

Can someone explain how to determine whether a coordinated compound is mono,bi,tri dentate???

Emily Glaser 1F
Posts: 156
Joined: Thu Jul 27, 2017 3:01 am

Re: Polydentates

Postby Emily Glaser 1F » Sat Dec 09, 2017 12:07 am

The most basic way to think about it is that if it has an atom (usually N or O) that has a lone pair and SINGLE bond, it is a dentate

Gobinder Pandher 3J
Posts: 21
Joined: Fri Sep 29, 2017 7:07 am

Re: Polydentates

Postby Gobinder Pandher 3J » Sat Dec 09, 2017 6:01 pm

Yeah Emily is right. My discussion's TA taught us that biological compounds with lone pairs (typically from N or O) would act as polydentates. However, he suggested that memorizing table 17.4 should suffice.

Posts: 44
Joined: Fri Sep 29, 2017 7:05 am

Re: Polydentates

Postby juchung7 » Sat Dec 09, 2017 6:32 pm

My TA also pointed out that for a molecule with COO attached, only one oxygen will be a dentate. Since one of the oxygens is double bonded and has 2 lone pairs, and the other is single bonded, only the singled bonded oxygen will be a point of attachment, so don't count every oxygen all the time.

Mary Becerra 2D
Posts: 53
Joined: Fri Sep 29, 2017 7:06 am

Re: Polydentates

Postby Mary Becerra 2D » Sat Dec 09, 2017 8:46 pm

One pattern I noticed was that the number of Nitrogens in a compound gave away whether it was mono, bi, etc. So 1 Nitrogen is mono, 2 Nitrogens is bi, etc. There may be acceptions but this is what I have noticed.

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