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84431-21-0

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84431-21-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 84431-21-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,4,3 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 84431-21:
(7*8)+(6*4)+(5*4)+(4*3)+(3*1)+(2*2)+(1*1)=120
120 % 10 = 0
So 84431-21-0 is a valid CAS Registry Number.

84431-21-0Downstream Products

84431-21-0Relevant articles and documents

Platinum(II) Complexes of Nitroimidazoles: Synthesis, Characterisation, and X-Ray Crystal Structures of cis-dichlorobisplatinum(II) and trans-dichlorobisplatinum(II)

Bales, John R.,Mazid, Muhammed A.,Sadler, Peter J.,Aggarwal, Aneel,Kuroda, Reiko,et al.

, p. 795 - 802 (1985)

A range of complexes of type 2X2> (where L is a substituted 5-nitroimidazole, and X2 is a dihalide or a dicarboxylate) has been prepared and characterised by a variety of methods, including 195Pt n.m.r. spectroscopy.These 5-nitroimidazole complexes had a cis stereochemistry as exemplified by the X-ray crystal-structure determination of cis-dichlorobisplatinum(II) .In addition, a number of analogous complexes of 2- and 4-nitroimidazoles were prepared.The 2-nitroimidazoles appeared to form the thermodynamically favoured trans complexes, rather than the kinetically favoured cis products.This was verified for trans-dichlorobisplatinum(II) 1/a>.This complex showed an unusual loss of planarity between the nitro-group and the imidazole ring, giving a dihedral angle of 45.6 deg.The geometry of the 4-nitroimidazole complexes was not determined.Co-ordination of the nitroimidazole ligand to PtII lowered the wavelength of the ?-?* electronic absorption band, and reduced the polarographic reduction potential by ca. 0.15-0.2V.

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