Alkali metals metal complexes with

Heterometallic alkali metal phosphide complexes with transition metals have also been reported. The complex [(Cy2P)3Hf(ju.-PCy2)2Li (DME)] results from the reaction of LiPCy2 with HfCl4(THF) (98). This complex persists in solution. Jones et al. have reported the synthesis and reactivity toward a range of electrophiles of a series of lithium di-t-butylphosphido(alkyl)cuprates [RCu(PBu2)Li] (R = Me,... 

The results for reaction (15.37) for the alkali metal cations complexed with 18C6 and 15C5 are shown in Figure 15.15. As with log K, the ArZ° values (ArG°, ArH°, and TAtS°) are plotted against the radius ratio. 

Fig. 9. Absorption spectra of alkali metal ion complexes with murexide 12...

Interactions of alkali metals cations (complexed with crown-ethers and kryptands) with aromatic Ji-systems 00EJO2967. 

Table 1.3. Comparison of the observed unit cell parameters (o ) for alkali metal-polyacetylene complexes with the minimum parameters calculated from the requirement that the metal ions fit in the channels and the minimum parameter calculated from the requirement of non-overlapping polyacetylene chains (6.04 0.36 A). (Reproduced from ref. 89 with kind permission. Copyright (1983) American Institute of Physics.)...

Amicangelo, J.C. Armentrout, P.B. Absolute binding energies of alkali-metal cation complexes with benzene determined by threshold collision-induced dissociation experiments and ab initio theory. J. Phys. Chem., A 2000. 104. 11420-11432. 

Absolute binding energies of alkali-metal cation complexes with benzene determined by threshold collision-induced dissociation experiments and ab initio theory ... 

Kudo, Y., Y. Takeda, and H. Matsuda, On the facilitating effect of neutral macrocyclic ligands on ion transfer across the interface between aqueous and organic solutions. Part 2. Alkali-metal ion complexes with hydrophilic crown ethers, J Electroanal Chem, Vol. 396, (1995) p. 333. 

A similar inversion of reactivities was also reported for thiolate active centers with alkali metal counterions complexed with cryptates, in propylene sulfide (2-methylthiirane) polymerization [111]. 

Table 7. Stability constants (log Ks) of alkali and alkaline-earth metal cation complexes with ligands of types A, B and C... 

Fig. 1. Comparison of the ATP ase activity of monactin in presence of alkali metal cations (9) with its complex formation with different cations (see Table 2)...

This chapter discusses the coordination chemistry of selected main group and transition metal complexes with dipicolinic acid, its analogues, and derivatives as ligands. Selected elements will be presented in terms of increasing atomic number. Out of all of the alkali metals, there has been a report of the crystal structure of sodium coordinated to dipicolinic acid. Calcium, magnesium, and strontium, three alkaline earth metals, are popular metal centers, which have been reported in the literature to be coordinated to dipicolinic acid or its analogues. ... 

Magnesium amides can form a wide range of mixed metal amido complexes with alkali metal ions (M2[Mg(NH2)4]) (M = K, Rb or Cs).These contain tetrahedral Mg-centered [Mg(NH2)4] ions connected in three-dimensional networks by coordination of the amido groups to the group 1 metal ions. The most common hetero metal is lithium and lithium amido magnesiates are readily accessible by the addition of a lithium amide to a magnesium amide. 

An interesting example is the determination of complex formation constants of alkali metal ions (M+) with crown ethers (L) ... 

ELECTRON GAS. The term electron gas is used to denote a system of mobile electrons, as. for example, the electrons in a metal that are free to move. In the free electron theory of metals, these electrons move through the metal in the region of nearly uniform positive potential created by the ions of the crystal lattice. This theory when modified by the Pauli exclusion principle, serves to explain many properties of metals, especially the alkali metals. For metals with more complex electronic structure, and semiconductors, the band theory of solids gives a better picture. 

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