Download Naming Complex Ions

Rupesh
CHEM 105b Dr. Parr
Week 14
04/06-04/10
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Naming Complex Ions
1. Fill out the following table
Formula
Name
Correction
Potassium tetrachlorocobalt(II)
Sodium dicyanodioxolatoironate(III)
Tetraaminechloronitrocobalt(III)
Dichloroethylenediamineplatinum(II) ion
Isomerism
2. How many isomers does square planar [Pd(NH3)2(SCN)2] have? Draw each isomer and
identify what kind of isomerism each displays. (Extra Practice: try it with tetrahedral geometry)
a. 2
b. 3
c. 4
d. 6
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Rupesh
Week 14
CHEM 105b Dr. Parr
04/06-04/10
3. Does either cis- or trans- [Co(C2O4)2(H2O)2]- have optical isomers? Draw them
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Crystal Field Theory
3. Draw the crystal-field energy-level diagrams and show the placement of d electrons for each of the
following
[Cr(H2O)6]2+
(4 unpaired
electrons)
[IrCl6]2(high spin)
[Mn(H2O)6]2+
(high spin)
[Cr(en)3]3+
[Ru(NH3)5H2O]2+
[NiF6]4-
(low spin)
MCAT Question of the Week
4. Which of the following pairs of compounds are not coordination isomers?
i. [TiBr2(H2O)(NH3)]NO3
ii. [TiBr(H2O)(NH3)(NO3)]Br
iii. [TiBr(NH3)(H2O)(NO3)]Br
a. i and ii
b. ii and iii
c. i and iii
d. i, ii and iii
Week 14 Tip: I hope you all did well on your Bio exam; however, EXAM 4 is NEXT WEEK! I know that came up on us fast
but don’t worry we are almost done. I know you are probably pooped from bio, but I encourage you all to start early.
The best way to succeed on this exam is practice… PrAcTiCe! PRACTICE!@!
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Rupesh
CHEM 105b Dr. Parr
Week 14
04/06-04/10
www.usc.edu/si
[email protected]
Naming Coordination Compounds
1. The cation is named before the anion
2. Ligands are named before metal ions
3. For ligand “o” is added to the root name of an anion. For neutral ligands the name of the
molecules is used with exceptions
4. The prefix: di, tri, etc., are used to denote the number of simple ligands. The prefixes bis,
tris, tetrakis are used for more complicated ligands that already contain di, tri, etc.
5. The oxidation state of the central metal ion is designated by roman numerals
6. Ligands are named alphabetically (ignore the prefix)
7. Of the complex ion has a negative charge, the suffix “-ate” is added to the name of the
metal. Sometimes Latin names are used to identify the metal.
Element
Name
Iron
Copper
Lead
Silver
Gold
Tin
Latin Names
Element
Latin
Symbol
Name
Fe
Ferrate
Cu
Cuprate
Pb
Plumbate
Ag
Argentate
Au
Aurate
Sn
Stannate
Neutral Molecules
Aqua
H2O
Ammine
NH3
Methylamine
CH3NH2
Carbonyl
CO
Nitrosyl
NO
Anions
Flouro
Chloro
Bromo
Iodo
Hydroxo
Cyano
FClBrIOHCN-
Approximate Relationship of Wavelength of Visible Light
Absorbed to Color Observed
Absorbed Wavelength (nm)
Observed Color
400 (violet)
Greenish Yellow
450 (blue)
Yellow
490 (blue-green)
Red
570 (yellow-green)
Violet
580 (yellow)
Dark Blue
600 (orange)
Blue
650 (red)
Green
3
Rupesh
CHEM 105b Dr. Parr
www.usc.edu/si
[email protected]
Week 14
04/06-04/10
4
Rupesh
CHEM 105b Dr. Parr
Week 14
04/06-04/10
5
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[email protected]