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Alkali and alkaline earth metal complexes

In contrast to the extensive coverage of transition metal Schiff base complexes, there is a somewhat desultory presentation of alkali and alkaline earth metal complexes of these ligands. [Pg.28]

Different types of benzo-15-crown-5 alkali and alkaline earth metal complexes (reproduced with permission... [Pg.39]

The ligand shape has changed and it has inflated on encapsulating the cation. The structures of a large number of [2.2.2]cryptand alkali and alkaline earth metal complexes have been studied by X-ray crystallography.372 Using the criterion that the optimum complexation occurs when the cation and cavity radii are similar, it can be predicted that for this ligand potassium is... [Pg.45]

The types of alkali and alkaline earth metal complexes subjected to molecular mechanics modeling fall into four categories crown ethers1255-2 ], cryptands1262 263 , spherands[264 2651, and other biologically important ligands such as ionophores and cyclic antibiotics1266-2691. [Pg.141]

Alkali and alkaline-earth metal complexes with inverse crown structures... [Pg.456]

In the crown ethers (18) the interactions between the ligand and metal ion are considered to be more electrostatic in nature, rather than the covalent binding observed for the transition metal complexes of the aza, thia, and phospha macrocycles. The thermodynamic properties of these macrocycles have been extensively studied, with numerous reviews covering complexation, selectivity, and structural aspects, some with extensive tables of thermodynamic data. Considerable efforts have been made to correlate the interrelationship between cavity size of the macrocycles and stability of alkali and alkaline earth metal complexes. From X-ray and CPK models, cavity radii are determined as 0.86-0.92A for 15-crown-5 (64), 1.34-1.43 A for 18-crown-6 (65), and about 1.7 A for 21-crown-7 (66). For complex formation between the alkali metal ions and 18-crown-6, the maximum stability... [Pg.2432]

A variety of alkali and alkaline-earth metal complexes are also formed by the isomeric ylides (10) and (11), both generated from a common phosphonium salt. ... [Pg.219]

See other pages where Alkali and alkaline earth metal complexes is mentioned: [Pg.15]    [Pg.15]    [Pg.17]    [Pg.23]    [Pg.33]    [Pg.34]    [Pg.59]    [Pg.215]    [Pg.219]    [Pg.221]    [Pg.229]    [Pg.231]    [Pg.233]    [Pg.235]    [Pg.237]    [Pg.239]    [Pg.241]    [Pg.247]    [Pg.249]    [Pg.251]    [Pg.253]    [Pg.255]    [Pg.257]    [Pg.259]    [Pg.261]    [Pg.263]    [Pg.265]    [Pg.267]    [Pg.269]    [Pg.271]    [Pg.573]    [Pg.65]    [Pg.1854]    [Pg.1854]    [Pg.1856]    [Pg.1862]    [Pg.1872]    [Pg.1873]   
See also in sourсe #XX -- [ Pg.97 , Pg.102 , Pg.173 , Pg.227 , Pg.228 , Pg.250 , Pg.301 , Pg.342 ]



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Alkali Alkaline

Alkali and alkaline earth metals

Alkali complex

Alkali complexation

Alkali metals complexes

Alkali, alkalinity

Alkali-earth metals

Alkaline complexes

Alkaline earth metals

Alkaline earth metals complexes

And alkalinity

Metal alkaline

Metals, alkali alkaline-earth

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