Linear cadmium compounds

Second order non-linear optical properties have been reported for a variety of TTF donor-acceptor compounds <02T7463> and the palladium complex 84 is a room-temperature semiconductor <02CL936>. Preparation of the zinc and cadmium compounds 85 has been reported <02CC1474> and aromatic fused TTFs such as 86 form thin films with useful electrical properties <02JAP265466>. A ferromagnetic interaction occurs in the salt of a TTF... 

Table h.1-155 Linear thermal expansion coefficient a of cadmium compounds... 

The samples for the linear Stark effect measurement were prepared as follows. First, 9 monolayers of cadmium arachidate were deposited on fused quartz plates with semitransparent A1 electrodes. Next, test layers which contained 30 layers of compound C180AZ0SN were deposited. Then, further 10 layers of cadmium arachidate were deposited. Finally, the semitransparent top A1 electrodes were vacuum-deposited. 

The electrodes modified by hexacyano-ferrates compounds were also used as voltammetric sensors [409-412]. The cadmium hexacyanoferrate-based composite ion-sensitive electrode for voltammetry was explored by Scholz and coworkers [409]. The potential of such electrode depends linearly on the logarithm of concentration of alkali and alkaline-earth metals ions in the solutions. Bo and fin have studied [410] Prussian blue (PB)/Pt modified electrode in GdGh electrolyte by cyclic voltammetry and in situ Fourier transform IR spectroscopy (FTIR) spectro-electrochemistry. Cadmium hexacyanofer-rates were formed on a PB film. 

In contrast, the number of known structures of homoleptic, monomeric two-coordinate amides of cadmium is currently limited to just one example. The structure of the compound [Cd N(SiMe3)2 2] has been determined by electron diffraction and the data showed that it has a linear NCdN skeleton with a Cd—N bond length of 2.03(2) A. It is clear, however, that several other homoleptic cadmium amides (known and others as yet not synthesized) can be predicted to have monomeric structures in the solid state. For example Cd NMR studies of amides such as [Cd N(SiMe3)2 2] or [Cd N(SiMe2Ph)2 2] indicate that they are... 

The molecule is made up of a zig-zag arrangement of germanium, cadmium, and nickel atoms, with localized linearity at cadmium and chain branching at nickel (Fig. 19). This compound also affords the only characterized examples of Ge—Ni (2.308 A) and Ge—Cd (2.587 A) bonds for an organogermanium compound. 

For zinc there are two major classes of organometallic compounds, R2Zn and RZnX, whereas only the R2Cd type are important. In the solid state the R2M compounds are probably all linear molecules, whereas the RZnX compounds are oligomers or polymers with /u —X or /u,3—X atoms. Both zinc and cadmium form... 

In salts of [Zn(NCS)4], the thiocyanate ligand is N-bonded, whereas it is S-bonded to cadmium in [Cd(SCN)4] salts, reflecting the respective hard and soft characters of the respective metal ions. Zinc complexes with the azide ion are well known crystallographic determinations of the structures of the compounds M2Zn(N3)4 (M = K or Cs) show the presence of discrete [Zn(N3)4] tetrahedra with linear azide groups. Some of the complexes in this category, such as those with hydrazine and azide, for example [Zn(N2H4)2(N3)2], are of interest as primary explosives and care is needed in their manipulation. The 2,2 -dipyridylamine-azide complexes [Zn(dpa)(N3)2] and [Zn(dpa)(N3)(N03)], which have infinite 2D and 3D structures respectively, display fluorescence and phosphorescence. ... 

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