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How many atoms are covalently bonded to the chromium atom?
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Topic: How many atoms are covalently bonded to the chromium atom? (Read 5345 times)
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LHM
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Posts: 144
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How many atoms are covalently bonded to the chromium atom?
«
on:
January 06, 2011, 08:57:29 PM »
How many atoms are covalently bonded to the chromium atom in Cr(NH
3
)
4
Cl
3
?
I thought it would be 7, but it's 6. Why?
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Fluorine
Chemist
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Posts: 202
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Re: How many atoms are covalently bonded to the chromium atom?
«
Reply #1 on:
January 07, 2011, 04:19:41 AM »
Is it specifically written Cr(NH
3
)
4
Cl
3
and not [Cr(NH
3
)
4
(Cl)
2
]Cl? From what I recall the second one would be six because four amine and two chlorine are bonding as well as a chloride ion to neutralize charge of chromium. Inorganic is my weakest aspect.
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I'm still learning - always check my work/answer.
"curse Pierre Jules César Janssen!"
LHM
Full Member
Posts: 144
Mole Snacks: +1/-3
Re: How many atoms are covalently bonded to the chromium atom?
«
Reply #2 on:
January 07, 2011, 05:09:58 PM »
Yeah, it did say Cr(NH
3
)
4
Cl
3
exactly, so should I just assume that meant [Cr(NH
3
)
4
(Cl)
2
]Cl? Cause I see how that would be six.
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Fluorine
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Re: How many atoms are covalently bonded to the chromium atom?
«
Reply #3 on:
January 07, 2011, 07:30:45 PM »
I'm not sure if it's safe to assume, especially not knowing the question's origin. If you know for certain it's six bonds and that is the exact formula they gave you then yes, personally, I would go [Cr(NH
3
)
4
(Cl)
2
]Cl.
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I'm still learning - always check my work/answer.
"curse Pierre Jules César Janssen!"
ardbeg
Regular Member
Posts: 82
Mole Snacks: +7/-3
Re: How many atoms are covalently bonded to the chromium atom?
«
Reply #4 on:
January 07, 2011, 11:14:50 PM »
have you studied ligand field theory yet? also, its a pretty general rule that transition metals have coordination numbers of 6 or less.
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How many atoms are covalently bonded to the chromium atom?