+1 oxidation state of Cu properties stability binary compound oxidation state and stereochemistry of copper (1) cuprou complex organic derivatives biological importance

1. Presentation on:
PRESENTED BY:
Khondaker Afrina Hoque
ID: 1114015.
Reg: 900048.
Session: 2011-2012.
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2. PRESNTATION ON
+1 OXIDATION STATE OF Cu
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3. +1 OXIDATION STATE OF Cu
ELECTRONIC STRUCTURE:
Copper Cu+(28): [Ar] 3d10.
PROPERTIES:
•Magnetism: Diamagnetic.
•Color and spectra: colorless.
[There are also some colored compounds:
Cu2O is yellow or red
Cu2CO3 is yellow etc.
•Stability:
Less stable than Cu2+ and Cu3+.
Cause: 1st ionisation potential is higher than the 2nd and 3rd
ionisation potential.
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4. BINARY COMPOUNDS
Cuprous oxide,Cu2O:
Preparation:
Reaction:
Use:
For making red ruby glass.
1.2CuCl +2NaOH=Cu2O↓(red) + 2NaCl + H2O
2.Fehling solution +glucose or
aldehyde=Cu2O↓(red) +salt of carboxylic
acid+ H2O.
Cu2O+H2SO4= CuSO4+ H2O
Cu2O+ 2HNO3= Cu+ Cu(NO3)2+ H2O
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5. Cuprous chloride,CuCl:
Preparation:
Use: CuCl solution in HCl is used in analysis for the absorption
of CO giving CuCl.CO.2H2O.
Cuprous iodide, CuI:
Preparation:
Use: This reaction is used for the iodometric determination of
Cu in solution .
CuCl2+ Cu= 2CuCl (ppt)
2CuSO4+ 4KI= 2CuI+ 2K2SO4 + I2
2Na2S2O3+ I2→Na2S4O6 + 2NaI
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6. Cuprous thiocyanate, CuSCN:
Preparation:
Use:
This reaction is used for gravimetric method for copper
determination and separation of copper from zinc .
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CuSO4 + 2NH4CNS= Cu(CNS)2 + (NH4)2SO4
2Cu+2 + HSO3
- + H2O = 2Cu+ +HSO4
- + 2H+
Cu+ + SCN- = CuSCN

7. OXIDATION STATES AND STEREOCHEMISTRY OF
COPPER (1).
OXIDATION
STATE
CO
ORDINATION
NUMBER
GEOMETRY EXAMPLES
2 linear Cu2O, KCuO, CuCl2-
Cu1, d10 3 planer Cu[CuCN]2,
[Cu(SPMe3)3]ClO4
4 tetrahedral CuI, [CuCN]3-
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8. CUPROUS COMPLEXES
1.K[Cu(CN)2]
2.(1,3-dimethyltriazeno) copper (1)
complex
Figure: a portion of spiral
chain in K[Cu(CN)2].
Figure: (1,3-dimethyltriazeno
) copper (1) complex.
2.26A◦
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9. CUPROUS COMPLEXES
3.PHOSPHINE AND ARSINE
COMPLEXES. 4.[CuH(PPh3)]6
Figure : Cubane complexes
,Cu4I4L4 (L=R3P, R3As)
Figure: the Cu6P6 group in
[CuH(PPh3)]6. the Cu-Cu
distances shown as full lines
have an average value of
2.65A◦ While those shown
broken lines average 2.54A◦11/16/2017 9

10. CUPROUS COMPLEXES
5: Cu4Cl6(Ph3PO)4 , Cu4OCl6Py4, and[(CH3)4N]4-[Cu4OCl10].
Figure: Cu4Cl6(Ph3PO)4 , Cu4OCl6Py4, and[(CH3)4N]4-[Cu4OCl10]
complexes.
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11. ORGANO DERIVATIVES
Acetylene complexes:
1.CuCl (in conc. HCl soln) + CH≡CH → CuCl(C2H2) or [CuCl2(C2H2)]-.
2.CuNH2 (soln)+ acetylenes containing CH≡C-→
Olefines complexes: They may be prepared by-
i. Direct rection with Cu1 halides.
ii. May also prepared from cupric salts by reduction with trialkyl
phosphites in ethanolic solution in presence of alkene.
Yellow or red ppt
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12. BIOLOGICAL IMPORTANCE
 Blue protiens like plastocyanin and azurin act as electron
transfer agents by means of a Cu2+/Cu+ couple.
 Another oxidase, is galactose oxidase found in fungi where
it catalyses the oxidation of –CH2OH in galactose to –CHO
simultaniously reducing O2 to H2O2 by means of Cu3+/Cu+
couple .
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