Transcript Co(NH 3 ) 4 SO 4

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Nomenclature of coordination
compounds :
IUPAC rules.
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Can describe the system through
which the complexes can be named
according to the number of rules
that were agreed upon by the
International Union (IUPAC) for
theoretical and applied chemistry
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1- When you write a compound formula must be
written ion compound in square brackets []
Where the metal first written code And then
order the coordinate groups as follows :
negative , neutral and cationic groups. for
example:
[CoSO4(NH3)4]NO3
[CoClCNNO2(NH3)3]
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2- To name the complex write the
name of the positive ion first and
then the negative ion as it is in
simple salts.
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Cation anion
Na
[Co(NH3)6]
K
Cl
Soduim Chloride
(NO3)3
Hexaamminecobalt(III)nitrate
[PtCl6]
- Potassium hexachloroplatinate
Potassium hexachloroplatinate(V)
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3 – name coordinate groups
A - coordination groups, such as
neutral molecules such as write
Ethylenediamine
NH2-CH2-CH2-NH2
B – Coordanation groups;
negative end
(o) such as
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# For anionic ligands end in "-o";
for anions that end in
"-ide“(e.g. chloride),
"-ate" (e.g. sulfate, nitrate), and
"-ite" (e.g. nirite),
change the endings as follows:
-ide -o;
-ate -ato;
-ite -ito
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Table 1. Names
of Some Common
Ligands :
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Anionic
Ligands
Names
SO42¯
sulphato
H¯
hydrido
F¯
Fluoro
Cl¯
Chloro
OH¯
Hydroxo
C2O42¯
Oxalato
CH3COO¯
Acetato
O22¯
Peroxo
O2-
oxo
NO2¯
nitro
SCN -
Thiocyano
CN -
cyano
ONO2-
nitrato
C- Coordinate groups a very rare
positive end (ium) such as hydrazinium
[NH2-NH3]+ and ammonium [NH4]+
D- There are some exceptions to
name Coordination in the following
cases :
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Table 2. Names of Some Common Ligands :
Neutral Ligands
Names
NH3
ammine
H2O
aqua
NO
Nitrosyl
CO
Carbonyl
O2
dioxygen
N2
dinitrogen
C5H5N
pyridine
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4- order of the Coordination groups
Called in the following order
1) negative group or atom
2) Neutral
3) positive
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As in the following examples
Chemical Formula
K4[Ni(CN)6]
[Co(NH3)4SO4]NO3
[Co(NH3)3(NO2)3]
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Nomenclature
botissum hexacyanonikel(П)
Potassium hexacyanonikel(П)
sulphatotetraamminecobalt(Ш)
Nitrate
Tetraamminesulphatocobalt(Ш)nitrate
Trinitrotriamminecobalt(Ш)
Triamminetrinitrocobalt(Ш)
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5- Greek prefixes are used to designate the number of
each type of ligand in the complex ion, e.g. di-, tri- and
tetra-.
If the ligand already contains a Greek prefix (e.g.
ethylenediamine) or if it is polydentate ligands (ie. can
attach at more than one binding site) the prefixes bis-,
tris-, tetrakis-, pentakis-, are used instead The
numerical prefixes are listed in Table
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Table3. Numerical Prefixes
Number
Prefix
Number
Prefix
Number
Prefix
1
mono
5
penta
9
(pentakis)
nona
(ennea)
2
di (bis)
6
hexa
(hexakis)
10
deca
3
tri (tris)
7
hepta
11
undeca
4
tetra
(tetrakis)
8
octa
12
dodeca
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Prefix numbers such as:
A-They are added before the names of
groups coordination or ions
Di
Tri
Tetra
Penta
Hexa
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B-The Avatar (bis), (tris),
(tetrakis), (pentakis), and
(hexakis) are used
by compound names for groups .
[Co(en)2Cl]SO4
Such as:
Chlorobisethylenediaminecobalt
(Ш) Sulphate
Chlorobis(ethylenediamine)cobalt(III)Sulphate
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6- names of the elements that
make up the central atom:
For the anionic complexes, the
name of the item ends with (ate) ,
while in neutral or cationic complexes
remains unchanged name of the item
as it is without the addition of :
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After naming the ligands, name the central metal.
-If the complex ion is a cation, the metal is named same as
the element.
For example, Co in a complex cation is call cobalt and Pt is
called platinum.
-If the complex ion is an anion, the name of the metal
ends with the suffix –ate.
For example, Co in a complex anion is called cobaltate and
Pt is called platinate.
For some metals, the Latin names are used in the complex
anions e.g. Fe is called ferrate (not ironate).
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For historic reasons, some coordination
compounds are called by their common
names.
For example,
Fe(CN)63- and Fe(CN)64- are named
ferriccyanide and ferrocyanide
respectively, and Fe(CO)5 is called iron
carbonyl.
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Table 4: Name of Metals in Anionic Complexes
Name of Metal
Iron
Copper
Lead
Silver
Gold
Tin
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Name in an Anionic
Complex
Ferrate
Cuprate
Plumbate
Argenate
Aurate
Stannate
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Chemical
Formula
Ca2[Fe(CN)6]
Nomenclature
calcium hexacyanoFerrate(II)
Calcium hexacyanoferrate(II)
amminum
NH4[Cr(NH3)2(NCS)4] tetrathicyanatobisethyleneammi
nechromate(III)
Ammonium diamminetetrathiocyanatochromate(III)
chloronitrotetraammineplatinum(IV)
[Pt(NH3)4(NO2)Cl]SO4 Sulphate
Tetraamminechloronitroplatinum(IV)sulphate
bisdimethylGlicosematonickel(II)
[Ni(DMG)2]
Bis(dimethylGlyoximo)nickel(II)
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7- Oxidation states
Reflects the oxidation states of an atom
the central element of the remembrance
of the corresponding figure in the Latin
name of the compound end
Or after the element name and put
number in brackets )II( . this
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K3[Al(C2O4)3]
potassium trioxalatoaluminumate(III)
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8-Groups that link the two atoms in the center
Some groups are linking between two
atoms in the center in
-complex multi-center and this is called
by adding the Latin alphabet -µ-befor
the names of the various groups that are
linking such as
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Bridge
-µ-dihydroxooctaaquadiiron(II) sulphate
di-µ-hydroxobis(tetraaquairon(II) )sulphate
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9- Some groups-giving can be linked to the
seed through a central element atoms such
as a group Althiocyanid (SCN ¯) are either
linked through
the sulfur atom or nitrogen atom, and the
name is different in each case as follows:
[SCN ¯] Thiocyanato
[N ¯ CS] Aazothiocyanato
[NO2 ¯] nitro
[-ON ¯ O] nitrato
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Examples:
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dichlorodiammineplatinum(II)
[Pt(NH3)2Cl2]
[Ti(H2O)6]Cl3
K3[CoF6]
diamminedichloroplatinum(II)
Hexaaquatitanium(III) chloride
Potissum hexafluorocobaltate(III)
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[Pt(NH3)4(NO2)Cl]SO4
[Ni(CO)4]
Na[Co(CO)4]
[(dipy)Pd(NCS)2]
[Co(en)3]3+
[Cr(H2O)4Cl2]Cl
[ZnCl5]3Na3[Co(NO2)6]
Hg[Co(SCN)4]
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[CuCl4]2H2[PtCl6]
[Co(NH3)4SO4]NO3
K[AgF4]
K4[Fe(CN)6]
Ba[Pt(CN)4]
Ca2[Fe(CN)6]
K3[Fe(CN)6]
Na2[Co(CN)4]
K4[Ni(CN)4]
Na2[CoCl4]
NH4[Cr(NH3)2(SCN)4]
K4[CoCl4]
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[Fe(H2O)6]SO4
[Co(NH3)6]Cl3
[Co(NH3)6](NO3)3
[Co(NH3)4SO4]NO3
[Co(NH3)4NO3]SO4
[Co(NH3)4Cl2]Cl
[Fe(H2O)6]SO4
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[Cr(H2O)4Cl2]ClO4
[Pt(NH3)4(ONO2)2]
[Ni(CO)4]
K3[Co(NO2)6]
[PtCl6]
NH4[Cr(SCN)4(NH3)2]
[Co(NH3)6][Cr(C2O4)3]
[Co(NH3)5Br]SO4
[Co(NH3)5Br]SO4
[Cr(en)2Cl2]Cl
[Pt(py)4][PtCl4]
K4[NiF6]
[Co(NH3)4 SO4]NO3
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