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Template Synthesis, Crystal Structure, and Spectroscopic Characterization of [N,N′-Bis(2-pyridylmethylene)-1,3-diamino-2-methyl-2-nitropropane] copper(II) Perchlorate

✍ Scribed by Peter Comba; Trevor W. Hambley; Geoffrey A. Lawrance

Publisher
John Wiley and Sons
Year
1985
Tongue
German
Weight
606 KB
Volume
68
Category
Article
ISSN
0018-019X

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✦ Synopsis

In a facile carbon-acid condensation reaction of bis(2-aminomethylpyridine)copper(II) with nitroethane and formaldehyde in basic MeOH the N,N' -bis(2-pyridylmethylene)-l,3-diamino-2-methyl-2-nitropropane)copper~I~) cation is produced in essentially quantitative yield. The perchlorate salt crystallizes in space group PZ,cn, a = 9.083(2), b = 15.198(3), c = 16.025(3). Cu(1I) is essentially four-coordinate, though there are weak axial interactions to the perchlorate 0-atoms. There is a large tetrahedral distortion from the least-squares plane through the Cu and four N donors; with the Cu(I1) in the plane, N-atoms are up to 0.25 A above or below. Solution spectroscopy confirms that the solution structure of the cation is qualitatively the same as in the solid. The complex and its precursor have been investigated by room-temperature magnetic-moment measurement, voltammetry, and by IR, electronic, and electron spin resonance spectroscopy.

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