Thallium, transition metal complex,

Thallium borinates, TKC5H5BR) (R = Me, Ph) are also used to synthesize transition-metal complexes "". Alkali-metal borinates react with TlCl in MeCN to give TKC5H5BR). In contrast to the alkali salts, thallium borinates are isoiatable compounds, e.g. ... 

The lithium and thallium (I) salts of i satin-3-oxime (isatin oximates) were employed in the development of ion-selective electrodes for these cations. Transition metal complexes of isatin derivatives can also be employed as catalysts for the oxidative self-coupling of alkylphenol s639,640. 

The BpMe ligand was synthesized in 197564 and converted to a variety of first-row transition metal complexes62 and tin(II) complexes.54 In a similar way the Bpph ligand was isolated as a thallium(I) salt, and was converted to first-row transition metal complexes (Bpph)2M, as well as to BpphMO(CO)2(V-CH2CRCH2) (R = H, Me).65... 

In this chapter we collect representative procedures for the preparation of the most popular family of /V-aryl p-diketiminate ligands, and of alkali metal and thallium salts that are especially useful precursors to transition metal complexes. We then describe the preparation of a series of useful p-diketiminato metal complexes with 3d transition metals from Sc to Zn, each of which serves as a template for further elaboration. 

The mixture of double bond isomers of l,2,3,4-tetramethyl-5-(trifluoro-methyl)cyclopentadiene (Cp H) is a clear, colorless liquid with a sweet ole-finic odor similar to that of pentamethylcyclopentadiene. Cp H is an air-stable compound but it should be stored in the refrigerator. Although gas chromatographic analysis shows two peaks, the presence of all three of the possible cyclopentadiene isomers is indicated by H NMR spectroscopy as three quartets for the ring protons are observed at 3.26 (Jhf = 10.0 Hz), 2.99 (Jhh = 6.7 Hz), and 2.66 ppm (Jhh = 6.8 Hz) with a relative ratio of approximately 1 16 2.4 for isomers I, II, and III, respectively. Resonances between 4.8 and 5.0 ppm are attributed to products that result from an elimination mechanism rather than cyclization in the last step of the synthesis. These impurities boil very close to that of Cp H, but they are removed by careful fractional vacuum distillation as part of the forerun. The IR spectrum (neat liquid) exhibits significant bands at 2977(vs), 2937(vs), 2884(s), 2864(s), 2751(w), 1658(m), 1599(s), 1446(s), 1384(vs), 1357(vs), 1280(s), 1258(vs), 1164(vs), 1099(vs), 1012(vs), and 686(m) cm . The syntheses of organotransi-tion metal complexes are usually carried out with the 91% purity Cp H product. Because alkali metal and thallium salts of Cp are unstable, organo-transition metal complexes are prepared from Cp H itself, as are many complexes of pentamethylcyclopentadiene and cyclopentadiene."... 

Bis(pentachlorophenyl)thallium chloride has been used as an arylating reagent for various transition-metal complexes. ... 

Although in this chapter we shall be restricting coverage to reactions of transition-metal complexes, the phenomenon of oxidative addition is not confined to this type of compound. Such reactions are also well established for non-transition metals—a recently reported example concerns the oxidative addition of methyl bromide to indium(i) bromide to give InBr2Me— and for non-metals, as in the reaction of phosphorus trichloride with chlorine, to cite a very familiar example. Likewise, reductive eliminations are known and studied outside the area of transition-metal complexes. One example has been mentioned in Chapter 1 of Part II of this volume, namely the elimination of alkyl halides from the thallium(iii) compounds TlRXa. ... 

---