The mechanism of formation and the stereochemistry of mono- and bis-complexes of rhodium(III) with 1,10-phenanthroline
- 1 January 1969
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 521-524
- https://doi.org/10.1039/j19690000521
Abstract
The dichlorobis-(1,10-phenanthroline)rhodium(III) cation is shown by 1H n.m.r. and vibrational (i.r. and Raman) spectroscopy to be a cis-complex. The perchlorate salt is isomorphous with cis-[Ir phen 2Cl2]ClO4(phen = 1,10-phenanthroline). Mechanistic studies with the rhodium(III) bromide–1,10-phenanthroline system show that [Rh phen Br4]– is first formed and then reacts with further phenanthroline to afford cis-[Rh phen 2Br2]+. The role of rhodium(I) intermediates is discussed. The new complexes [phen H][Rh phen X4](X = Cl, Br, or I) are reported. Electronic and vibrational spectroscopy suggest that the dichlorobis-(2,2′-bipyridyl)rhodium(III) cation has cis-stereochemistry as has the new complex dichlorobis(2,4,7,8-tetramethyl-1,10-phenanthroline)rhodium(III) chloride dihydrate.Keywords
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