Neutral ligands

Neutral and Cationic Ligands. Neutral and cationic ligands are used without change in name and are set off with enclosing marks. Water and ammonia, as neutral ligands, are called aqua and ammine, respectively. The groups NO and CO, when linked directly to a metal atom, are called nitrosyl and carbonyl, respectively. 

Figure 6 Crystal structure of the mixed ligand neutral metallacarboranes of titanium(iii). Reproduced by permission of the American Chemical Society from Organometallics 1997, 16, 1365.

If the ligand (neutral carrier) is capable of completely enveloping the cations, the terms Ky and Eq of the membrane depend only on the ratio of the complex stability constants K JK of the ions with the ionophore. 

Kinetic parameters k, often also and AS, occasionally AV ) for formation and dissociation of several pentacyanoferrate(II) complexes [Fe(CN)5L]" have been established. Ligands L include several S- and A-donor heterocycles,4-methyl- and 4-amino-pyridines, a series of alkylamines, 3- and 4-hydroxy- and 3- and 4-methoxy-pyridines, several amino acids, nicotinamide, " 4-pyridine aldoxime, 3-Me and 3-Ph sydnones, several bis-pyridine ligands,neutral, protonated, and methylated 4,4 -bipyridyl, 1,2-bis(4-pyridyl)ethane and traTO-l,2-bis0-pyridyl)ethene, pyrazine- 4,4 -bipyridyl- and bis(4-pyridyl)ethyne-pentaammine-cobalt(III), edta-ruthenium(III), and pentaammineruthenium-(II)and-(III) complexes of... 

The type of ligand (neutral molecules or anions) determines the charge of the transition metal complex and hence the conditions such as support nature and pH range, for which ion exchange can occur. 

One example is the recent work developed by Montes et al. (70) in which a Box-Behnken design was used in flow-through PEACE. Injection time, voltage, and neutral ligand (neutral arylsulfonamides [[[4-(aminosulfonyl) phenyl)methyl]-amino]-6-oxohexanoic acid and p-toluenesulfonamide) con-... 

Partial-filling affinity conditions optimization. Box-Behnken design. Factors injection time, voltage, neutral ligand (neutral... 

Extracts into CHCI3. The two negative ligands neutralize the +2 charge of the central ion. 

Compounds included in this chapter are the homoleptic amides and imides of empirical formula M(NRR ) and M(NR) , where R, R = H, alkyl, aryl or trialkylsilyl, and the mixed amido-imido compounds of formula M(NRR ) (NR). Brief mention is given to certain compounds of formula L M(NRR ) or L M(NR) , where L represents a group of ligands, neutral or anionic, which also share the coordination sphere of the metal, when the chemistry of the M—N bond is of particular note. Metal-containing compounds derived from halogen azides are not discussed. 

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