hard repulsion question

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jeriu
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#1
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I'm having a hard time deciphering how i would answer this question since I've never seen a question like this that has a transition metal, so can i get some help please.

im guesiing cl would bond 4 times
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Pigster
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(Original post by jeriu)
I'm having a hard time deciphering how i would answer this question since I've never seen a question like this that has a transition metal, so can i get some help please.

im guesiing cl would bond 4 times
What actually is the Q you're struggle with?
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jeriu
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HWLB ME
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Personinsertname
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https://www.thestudentroom.co.uk/sho....php?t=4773094
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eznot
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I think you are just expected to learn the shapes of transition metal complex ions.

I've attached a picture out of my revision guide it tells you all you really need to know.

The only two exceptions are Pt and Ni which will form a square planar
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kursk1896
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(Original post by jeriu)
I'm having a hard time deciphering how i would answer this question since I've never seen a question like this that has a transition metal, so can i get some help please.

im guesiing cl would bond 4 times
im guessing youre doing AS? if youve done A2, it follows the exact same principle as e.g. [CuCl4]2- which has a tetrahedral structure. Hence its tetrahedral, and has a bond angle of 109.5 degrees. this is because rhodium is a transition metal and transition metals (generally) follow certain characteristics, such as coloured complexes, specific shapes, variable oxidation states and an incomplete d sub shell.
(whilst it could be square planar as well bc of the fact that it does also have 4 coordinate bonding pairs, this is only seen at A2 with platinum and the only example of a platinum complex at A2 is cisplatin ( (NH3)2PtCl2 ) which bears less similarity to [RhCl4]2- compared to [CuCl4]2- )
Last edited by kursk1896; 3 years ago
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alstudent_2019
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(Original post by jeriu)
I'm having a hard time deciphering how i would answer this question since I've never seen a question like this that has a transition metal, so can i get some help please.

im guesiing cl would bond 4 times
a good rule of thumb for A-level chemistry and transition metals: unless not specified or told that it contains no lone pairs of electrons on the central metal ion, and its a metal ion with 4 ligands, then its a tetrahedral, the latter being something like Cis-platin or trans-platin.
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CuriosityYay
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(Original post by jeriu)
I'm having a hard time deciphering how i would answer this question since I've never seen a question like this that has a transition metal, so can i get some help please.

im guesiing cl would bond 4 times
Since no other info is given about it, it is expected from you to associate four bonds with the tetrahedral shape and 109.5 degree bond angle.
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Jaguar1200
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#9
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remember you guys, the planar sqaure shape arises when more than 1 ligand is present (ammonia and Cl- in cisplatin). all others are tetrahedral bond angle 109.5°
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