Inorganic nitrosyl compounds. II. Coordination compounds.

The Chemical Properties of Nitrosyl Perchlorate: The Neutralization Equivalent

“…This same conclusion can be reached by comparing the slopes of the curves in Fig. 2. The data plotted in Figs.…”

“…The data plotted in Figs. 2 and 3 indicate that the same species of reactants are involved in the rate-determining step, regardless of the acidity of the reaction medium.…”

Platinum metal pioneer: James Lewis Howe (1859-1955)

“…Nevertheless, the necessity for complete analytical data, i.e., the direct determination of every constituent in deducing the formula of a compound should be obvious, and this Another problem encountered by workers in the field that is exemplified by the compound under discussion is the question of the oxidation state (valence) of ruthenium, especially in its simple and complex chlorides. The problem is further complicated in the case of nitrosyl compounds, for nitric oxide, being a molecule with an odd number of electrons can form coordination compounds in three different ways: (1) loss of the odd electron followed by coordination of the resulting NO+ group, (2) coordination of the neutral NO molecule, or (3) gain of an electron followed by coordination of the resulting NO" group (45,46). For example, in the compound Ru(NO)Cl3, these three possible methods of combination would lead to oxidation states of (II), (III), or (IV), respectively, for the ruthenium atom.…”

Stabilization of oxidation states through coordination

“…Cobalt (III) compounds with a coordination number of six have an effective atomic number of 36 as do the cobalt carbonyl hydride (62) and cobalt nitrosyl carbonyl. The cobalt in the latter two compounds has an apparent oxidation state of -1 (7,51). The very stable rhodium (III) and iridium (III) compounds with a coordination number of six also have the e. a. n. of inert gases.…”

“…The oxidation state of three is very uncommon in simple salts of cobalt, but in coordination compounds the oxidation state of three is commonly encountered. The compounds K[Co(CO)4] and Co(CO)3NO have been cited as examples of cobalt in an oxidation state of minus one (7,51). Cobalt (IV) is found in the heteropolymolybdate 3K20-Co02 9Mo03-61/2H20 and in some of the binuclear complexes containing peroxide ion as one of the two bridging groups.…”