Preliminary Investigations of the Reactions of the Hexaquo Chromium(III) Ion with alpha,alpha'-Dipyridyl and with o-Phenanthroline.

One‐step, two‐electron oxidation of cis‐diaquabis(1,10‐phenanthroline)chromium(III) to cis‐dioxobis(1,10‐phenanthroline)chromium(V) by periodate in aqueous acidic solutions

“…The complex cis ‐[Cr III (phen) 2 (H 2 O) 2 ](NO 3 ) 3 ·2.5H 2 O (phen = 1, 10‐phenanthroline) was prepared by a method similar to that reported in the literature, but using a 1:2.1 mole ratio of chromium(III):phen instead of 1:3 5,18. The crude product was recrystallized from 0.10 M HNO 3 .…”

Hard X-ray microprobe studies of chromium(VI)-treated V79 Chinese hamster lung cells: intracellular mapping of the biotransformation products of a chromium carcinogen

“…Na 2 Cr 2 O 7 (Merck, AR grade) was used as received. cis-[Cr(phen) 2 (OH 2 ) 2 ](NO 3 ) 3 .2.5H 2 O was prepared according to the method of Inskeep and co-workers [28,29] and was recrystallized from 0.1 M HNO 3 [29]. Oxidation of cis-[Cr(phen) 2 (OH 2 ) 2 ] 3+ was performed by reacting PbO 2 (4·molar excess) with cis-[Cr(phen) 2 (OH 2 ) 2 ] 3+ (20 mM in 50 mM acetate buffer, pH 3.3) for 60 min at 37°C, g iso =1.9386, and the solution was filtered through a 0.2-lm filter to remove any excess PbO 2 [22].…”

A Stopped-flow Study on the Kinetics and Mechanism of CO2 Uptake by the cis-[Cr(1,10-phenanthroline)2(OH2)2]3+ Complex Ion

“…Cis-[Cr III (phen) 2 (OH 2 ) 2 ](NO 3 ) 3 2,5 H 2 O was prepared according to the literature method [14]. Recrystallization of the product from 0.10 M HNO 3 yielded dark orange needles.…”