Neocuproine
Synonym : .2,9-Dimethyl-1,10-phenanthroline;
2,9-dimethyl-o-phenanthroline,
3,6-dimethyl-4,5-phenanthroline
CAS No. :
484-11-7
Mol. Formula:
C14H12N2
Molecular Wt.:
208.26
Description:
white to beige powder
Melting point:
162-164ºC
Solubility:
clear
colorless to light yellow solution at
50mg/ml in methanol.
It is soluble in ethanol, n-amyl alcohol,
isoamyl alcohol, n-hexyl alcohol,
chloroform & benzene & slightly soluble in
cold water.
WATER BY KARL FISCHER :< OR = 5% |
Application
Neocuproine
is used in the determination of copper in
water.
It is used in determination of copper in
heavy matrices by carbon furnace
atomic-absorption.
Neocuproine reacts with copper(I) with the
pH range 3-10, to form an orange complex
extractable with n-amyl & isoamyl alcohols,
n-hexanol & MIBK. Neocuproine is added to
the sample as an ethanol solution & the
complex formed is extracted with CHCl3.
Substitution of methyl groups at 2- & 9-
positions in 1,10-phenanthroline renders the
reagent unreactive towards iron (II). |
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