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Reply
| | From:  Albert1145 (Original Message) | Sent: 4/16/2008 8:29 AM |
Hi Steve,
Thank you for the link, its really helpful!
I got more questions though, could you pleasecheck if I've got the right answers? I've marked my answers with -*- at the end.
Q2 How many unpaired electrons are present in the complex ion [Fe(H2O)6]3+? (water - weak field ligand)
5
4 *
0
2
3
Q3 The oxidation state of the central metal ion in the complex ion [CoCl2(NH3)4]+ is:
5+
4+
2+
6+
3+ *
Q5 The oxidation state of the central metal ion in the complex [CrCl4(H2O)2]- is:
5+
4+
3+ *
6+
2+
Q6 The spin only magnetic moment for the complex [Fe(H2O)6]2+ is (water - weak field ligand):
5.92 BM
1.73 BM
3.88 BM
4.90 BM *
2.83 BM
Q7 The complex ions of Zn2+ are all colourless. The most likely explanation for this is:-
�?Zn2+ is paramagnetic
�?none of these statements is correct.
�?Zn2+ is an alkali metal.
�?Zn2+ exhibits d orbital splitting in its complexes such that they absorb all wavelengths in the visible region. *
�?since Zn2+is a d10 ion, it does not absorb visible light even though the d orbital splittings are correct for absorbing visible wavelengths.
Q10 The spin only magnetic moment for the complex [Cr(H2O)6]2+ is (water - weak field ligand):
3.88 BM
4.90 BM *
2.83 BM
5.92 BM
1.73 BM
Q11 Which of the following d orbital splitting diagrams is correct for the complex ion K4[Fe(CN)6]?
�? (dxy)2 (dxz)2 (dzy)1 (dx2-y2) (dz2)
�?none of these listed here *
�?(dxy)1(dxz)1 (dzy)1 (dx2-y2)2 (dz2)2
�?(dxy)2 (dxz)2 (dzy)2 (dx2-y2)1 (dz2)
�?(dxy)2 (dxz)2 (dzy)2 (dx2-y2)(dz2)
Q12 The complex ion [Fe (CN)6]4- is classified as
�?intermediate spin
�?impossible to predict
�?reduced spin
�?high spin
�?low spin *
Thank you very much
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Reply
| | | From: ·Steve· | Sent: 4/16/2008 4:48 PM |
Q2  Fe3+ is a d5 system
Q3  |
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Reply
| |
These are my new answers:
Q2 How many unpaired electrons are present in the complex ion [Fe(H2O)6]3+? (water - weak field ligand)
5 *
4
0
2
3
Q7 The complex ions of Zn2+ are all colourless. The most likely explanation for this is:-
�?Zn2+ is paramagnetic
�?none of these statements is correct.
�?Zn2+ is an alkali metal.
�?Zn2+ exhibits d orbital splitting in its complexes such that they absorb all wavelengths in the visible region.
�?since Zn2+is a d10 ion, it does not absorb visible light even though the d orbital splittings are correct for absorbing visible wavelengths. *
Q11 Which of the following d orbital splitting diagrams is correct for the complex ion K4[Fe(CN)6]?
�?(dxy)2 (dxz)2 (dzy)1 (dx2-y2) (dz2)
�?none of these listed here
�?(dxy)1(dxz)1 (dzy)1 (dx2-y2)2 (dz2)2
�?(dxy)2 (dxz)2 (dzy)2 (dx2-y2)1 (dz2)
�?(dxy)2 (dxz)2 (dzy)2 (dx2-y2)(dz2) * |
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