Gaseous Ligands

One of the techniques for producing coordination compounds is to simply combine the reactants. Some reactions may be carried out in solution, but others may involve adding a liquid or gaseous ligand directly to a metal compound. Some reactions of this type are the following ... 

D. Active Site Environment Human HO-1 Crystal Structure Interaction with Cytochrome P450 Reductase Gaseous Ligands... 

After iron insertion and reduction, both visible absorption [74, 75] and HNMR [90] spectra were consistent with five-coordinate high-spin (5=2) iron(n) complexes. The NMR spectrum of such a complex in which an axial pyridine is inserted in the handle shows that the isotropic shifts are mainly contact in nature. From this observation, it was concluded that the complexes remain predominantly pentacoordinated in the absence of a gaseous ligand. 

Equilibria involving the addition of a gaseous ligand A special notation is used for constants describing equilibria that involve the addition of a gaseous ligand, as outlined in Eq.(11.20) ... 

Kinetics and Equilibrium Constants for Binding of Gaseous Ligands to Leghemoglobins and Other Monomeric Hemoglobins (21, 55, 56, 166, 167)... 

Binding a gaseous ligand increases the total entropy of ML (H2) relative to ML but does so by a relatively minor amount compared to the entropy lost by the ligand.61 On this basis the total entropy of exchange for Eq. (717) should depend primarily on the differences in absolute entropies for N2(g) and H2(g) ... 

As stated in Sec. 1-22, a number of stable and unstable complexes of the ML type have been synthesized via matrix co-condensation reactions of metal vapor(M) with gaseous ligands(L). Table 111-53 lists typical results obtained... 

Orlowski, S., Nowak, W. (2008). Topology and thermodynamics of gaseous ligands diffusion paths in human neuroglobin. Biosystems, 94, 263. 

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