Mass Spectral Studies of 1-(2'-Pyridylazo)-2-phenanthrol & of Its Chelates with Cu(II), Co(II), Co(III) & V(V)

1019-102

Magnetic Properties of Ru(III) Complexes of 1-(2-Pyridylazo)-2-naphthol & 1-(2-Pyridylazo)-2-phenanthrol

907-90

Copper(II), Nickel(II) & Cobalt (III) Complexes of Monothiosemicarbazone of 9,10-Phenanthraquinone

433-43

ESR Studies on Copper(II) Complexes of Thiosemicarbazone of the Manich Base of Isatin

430-43

1-(2-Pyridylazo)-2-Phenanthrol (PAP) as an Extractive Chromogenic Reagent for Platinum(IV)

Platinum(IV) forms a green complex with 1-(2-pyridylazo)-2- phenanthrol (ten fold excess) when heated on a boiling water bath for about 2 hours (pH 2.9 to 5.5). The complex is soluble in 75% ethanol, methanol and extractable in chloroform and shows maximum absorbance at 670 nm. Beer’s law is obeyed upto 7.943 ppm of platinum at 670 nm. The sensitivity of the method is 0.0283 μg Pt(IV)/cm2 for log I0/I = 0.001 and the molar extinction coefficient ε670 = 8400 litre mole-1 cm-1. The composition of the complex is 1:1 as determined by Job’s method. The possibility of determining platinum(IV) in the presence of various diverse ions has also been investigated