Preparation and properties of the nitrido-bridged osmium(IV) binuclear complexes (Os sup IV sub 2 N(NH sub 3 ) sub 10 minus n Cl sub n )Cl sub 5 minus n (n = 2, 3)

Journal Article · Tue Dec 26 23:00:00 EST 1989 · Inorganic Chemistry; (USA)

DOI:https://doi.org/10.1021/ic00325a022· OSTI ID:6945385

Kim, Sook-Hui; Azan, S ^[1]; Moyer, B A; Brown, G M; Allison, D P ^[2]; Olins, A L ^[3]

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1. Oak Ridge Associated Univ., TN (USA)
2. Oak Ridge National Lab., TN (USA)
3. Oak Ridge National Lab., TN (USA) Univ. of Tennessee-Oak Ridge Graduate School of Biomedical Sciences (USA)

The nitrido-bridged osmium(IV) binuclear complexes (Os{sub 2}N(NH{sub 3}){sub 8}Cl{sub 2})Cl{sub 3} {times} 2H{sub 2}O (I) and (Os{sub 2}N(NH{sub 3}){sub 7}Cl{sub 3})Cl{sub 2} {times} H{sub 2}O (II) have been shown to be products of the ammonolysis of sodium hexachloroosmate(IV) (Na{sub 2}(OsCl{sub 6})) in aqueous ammonia at elevated temperatures. Spectral (infrared and uv-vis) and electrochemical properties of the complexes have been explored. In aqueous solution, I and II undergo aquation reactions involving the chloro ligands, and the resulting aqua complexes of I and II exhibit respectively two and three ionizable protons with pK{sub a} values in the range 3.6-7.3. In purified form, the complexes I and II plus their aquated derivatives were found to be ineffective as DNA-selective, electron-dense stains for electron microscopy, whereas effective staining was observed with unpurified mixtures. 26 refs., 1 fig., 1 tab.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6945385
• Journal Information: Inorganic Chemistry; (USA), Journal Name: Inorganic Chemistry; (USA) Vol. 28:26; ISSN 0020-1669; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CHEMICAL PREPARATION
CHLORINE COMPOUNDS
COMPLEXES
DATA
EXPERIMENTAL DATA
HALOGEN COMPOUNDS
INFORMATION
NITROGEN COMPOUNDS
NUMERICAL DATA
OSMIUM COMPLEXES
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TRANSITION ELEMENT COMPLEXES