Cobalt hexaamines

Fig. 12. Plot of number of amine protons versus log of the self-exchange rate constant (M s ) for cobalt hexaamine complexes at 25°C. No correction has been made for ionic strength differences. The data include some nonhomoleptic complexes. (1) [CoCNHslg], (2) [Co(en)3]3+ 2+, (3) [Co(chxn) ] + 2+ (4) [Co(tmen) ]3+ 2+, (5) [Co(dien)"]"+ 2+, (6) [Co(pet) P+ 2+, (7) [Co(linpen)P" 2 + (g) lCo(medien)(9) [Co(tacn)(dien)]3+ 2+, (10) [Co(tacn) (pet) (11) [Co(tacn) (etdien) (12) [Co(tacn) (budien) p+ 2+ 3 [Co(tacn)(medien)P, (14) [Co(diAmsar)] , (15) [Co(taptacn)P, (16) [Co(metacn) ] 2+, (17) [Co(diAmsar)P 2+, (18) [Co(sar)(19) [Co(sep)P 2, (20) [Co(dtne)] , (21) [Co(Amsartacn)], (22) [Co(Amsartacn)] , (23) [Co-(diAmchxnsar)] , (24) [Co(diAmchxnsar)] . The data for homoleptic complexes are taken from Table IV the other data are from reference U02). The line was calculated without the data for the sep and sar derivative cages and the [Coftmenls] couple.

Treatment of aldehydes with cobalt hexaamine bis(tetracarbonyl)cobal-tate gives complexes of structural type [(RCH= NH)Co(NH3)5][Co(CO)4]2. Exposure of the latter to bromine results in nitrile formation in variable yields (Rhee et al, 1970). Hydration of nitriles to amides can be homo-... 

Poly(dG-dC) poly(dG-dC) and its methylated analogue structures assume left-handed conformation (Z-DNA) in high molar sodium salt (Na", K" ), in low molar divalent cations (Ca", Mg", Ni ), micromolar concentrations of hexaamine cobalt chloride (Co(NH3)6)Cl3 and in millimolar concentrations of polyamines. In order to analyse the binding of berberine to Z-form DNA, Kumar et al. [186] reported that the Z-DNA structure of poly(dG-dC) poly(dG-dC) prepared in either a high salt concentration (4.0 M) or in 40 mM (Co(NH3)6)Cl3 remained invariant in the presence of berberine up to a nucleotide phosphate/alkaloid molar ratio of 0.8 and suggested that berberine neither bormd to Z-form DNA nor converted the Z-DNA to the... 

Forms a number of coordination compounds (ammonia complex) with several metals adds to AgCl forming soluble complex [Ag(NH3)2]Cl forms tetraamine complex [Cu(NH3)4]S04 with CUSO4 and forms many hexaamine complexes with cobalt, chromium, palladium, platinum and other metals. 

Methyl-1,5-diamino-3-azapentane, cobalt(III) hexaamines, 35 141-142 W-Methyl-l,2-diarainoethane, cobalt(III) hexaamines, 35 132-133... 

Methyl-S-coenzyme-M reductases, 40 342-343 1 -Methyl-2,4,6-triaminocyclohexane, cobalt(III) hexaamines, 35 143-144 2-Methyl-1,2,3-triaminopropane, cobalt(III) hexaamines, 35 142... 

Molecular electronics, class II mixed-valence complexes, 41 303-304 Molecular light switch effect, 43 148 Molecular mechanisms, cobalt(III) hexaamines, 35 119-120 Molecular orbital calculations... 

Structure, Reactivity, Spectra, and Redox Properties of Cobalt(III) Hexaamines Philip Hendry and Andreas Ludi... 

Table 2.5. The influence of 1,3-nonbonded interactions on the ideal metal-ligand bond distance of chro-mium(III), cobalt(III), and nickel(II) hexaamines.

---