Ligands benzothiazole

When the reaction of [AujCgFsjjtht)] is carried out with C6F4NCSPPh2 the complex [56] shovm in Figure 3.5 was obtained and its structure was determined by X-ray diffraction. The benzothiazole ligands are known to display photophysical properties vdth an improvement of the photostability and emission intensity in conjugated systems as well as in the complexes that contain them, and the presence of... 

Finally there is a report of an ill-characterized benzothiazole complex [RhCl(C7HsNS)2]2. The benzothiazole ligands may be N-bound.103... 

The reaction of [CpFe(CO)jCl] with hthium isothiazol and subsequent methylation (protonation) with CFjS03Me(H) to the respective isothiazol-5-ylidene complex of iron(ll) follows the already familiar route [54]. The protonation of the thiazolyl hgand is so facile that it can even occur when cyclopentadiene is used as the acid [47] (see Figure 6.17). Note the N-H-N hydrogen bond between the two benzothiazol ligands. 

Tris(thiazol-2-yl)phosphine (L) and tris(benzothiazole-2-yl)phosphine (L) with [( j" -cod)PtMe2] give the cw-[L2PtMe2] complexes where the ligand is coordinated via its P donor center (73JOM(59)411, 76JA6521, 82JOC1489). 

In the rhodium and iridium complexes, the C-coordination, carbene function, and cyclometallated cases prevail. Benzothiazole-2-thione was studied extensively as a ligand and various situations of the exocyclic S-monodentate coordination as well as N,S-combinations in the di-, tri-, and tetranuclear species were discovered. 

A number of Pd or Cu catalysts bearing NHC ligands have been prepared for carbonylation of aryl halides. Nacci and co-workers synthesised the benzothiazole carbene ligated Pd complex 32 (Fig. 9.6) and tested it for aryl halide carbonylation... 

The Suzuki coupling of aryl halides was also extended to tosylates recently. Benzothiazole 5-tosylate reacted with m-xylene-2-boronic acid (6.13.) to give the coupled product in 94% yield using palladium acetate and a stericly congested biphenyl based phosphine ligand as catalyst.17 Another class of less commonly utilised cross-coupling partners are methyltio derivatives. In the presence of a copper salt, which activates the carbon-sulphur bond, 2-methyltio-benzotiazol coupled readily with a series of arylboronic acids.18... 

L)(cod)2]2 (M, M = Rh, Ir M = Ir, M = Rh) (96IC4360). The number of complexes having structure 241 is much less. The thiol form of the ligand does not lead to chelate structures. Such a monodentate S coordination is observed in the complex anion of ([n-Bu4N]+[ZnL3] H20 (251) and the cationic complex of the trisulfide derivative of benzothiazole (252). 

FeClJ X = S) used to model the active sites of the nonporphyrine iron proteins with the N,S-ligand environment [96MI8 97JCS(CC)1711]. Additional metal cyclic structures are formed upon introduction of an azole framework to the hydrazone systems (291) (92MI8), in which the imino tautomer of the benzothiazole is fixed. 

A crystal structural analysis of the complex [NEtO[CclL3] (HL = benzothiazole-2(3if)-thione) (120) has been reported the anion possesses strict C3 symmetry with the ligand acting as a bidentate N,S donor (Cd—S, 2.667 A Cd—N, 2.47 A).840... 

A number of complexes of zinc with benzothiazole and other sulfur-containing ligands have been described and the crystal structure of [NBuJ [ZnQ CNMe (02CMe), which contains a square pyramidal ZnS40 unit, has been reported.91 ... 

Zinc ethanoate behaves similarly to mercury(II) ethanoate on reaction with 2-(2-pyridyl)benzothiazole and gives complexes of a ring-opened ligand.928... 

A number of benzothiazole-Schiff base complexes of the type (43) have been evaluated against Helminthosporium oryzae. Complex (43) and its zinc analogue were found to show enhanced activity relative to the free ligand.106 The activity was very dependent on the substituent in the benzothiazole ring. Some analogous 4-phenylthiazole complexes of both metals were also effective,... 

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