Arenes bridges

Fig. 48 A /j-t-butylcalix[4]arene bridged at the lower rim with a ruthenium(II)-...

M= (transition) metal ar= (hetero) arene bridging unit L - ar= complexii ligand - (hetero) arene Fig. 2 Schematic drawings of metal-containing PAE structures (see text)... 

Dimeric 7r-arene-bridged samarium anilide [Sm(NHArl Pr,H)3]2 was employed in the isolation and characterization of a dimeric amido-imido compound. Addition of 4 equivalents of TMA led to (1) cleavage of one of the Ln-NHPh bonds, (2) deprotonation, and (3) adduct formation. Density functional theory calculations, carried out in order better to understand the nature of the imido bonding, revealed the presence of Sm - N 7r-bonding interactions involving the samarium 5d orbitals [218]. 

Fig. 1 Schematic illustration of the synthesis of four <-butylcalix[4]arene bridged ball-type Zn-Pc 2 and metal-free Pc 3. Reagents and conditions for 1 (i) K2CO3, DMSO, 85° C, 76 h, (ii) for 2 DMF, Zn(OAc)2,2H20,190° C, 24h in sealed tube. Yield 17% (iii) for 3 lithium metal, 1-pentanol in sealed tube 176° C, 18h. Yield 55% [37]...

Rare-earth bisphthalocyaninates, especially LuPc2, are one of the important objects of intense investigation because of their electrochemical (electrochromic effect), electrical, and optical properties. The ball-type four t-butyl-calix[4]arene bridged double decker lutetium(III) and indium(III) Pcs have also been prepared, Fig. 3 [42],... 

Novel ball-type four f-butyl-calix[4]arene bridged double deckers lutetium(III) phthalocyanine [LuPc2(tbca)4] 10 and indium(III) phthalocyanine [InPc2(tbca)4] 11 were prepared by the reaction of l,3-bis(3,4-dicyanophenoxy)-4-fe/t-butylcalix arene 9 and the corresponding metal salts (Lu(OAc)3 3H20 and InCl3) in the presence of lithium metal in 1-pentanol under N2 in a sealed tube for 15h, Fig. 3. Yields of 10 and 11 were 18 and 55%, respectively. 

The electrochemical measurements of one t-butylcalix[4]arene bridged Lu clamshell and Lu double decker clamshell Pcs were investigated in solution [23] and with cast film on indium tin oxide (ITO) glass electrode also by means of spectroelectro-chemistry in detail [26],... 

In case of ball-type Pcs, there are only two studies reported on the NLO and OL properties of metallo and double-decker Lu(III) and In(III) Pcs in the literature [42, 60]. The NL refraction and absorption dependence on thermal effect for 4-ns pulse duration in ball-type with four t-butylcalix[4]arene bridged ZnPc 2 in Fig. 1 in solution have been studied [60]. z-Scan experiments were performed on 2 in chloroform solution with a 10-cm-focal length lens. The results are shown in Fig. 24a. 

Scheme 6.8 Arene-bridged triple-decker sandwich complexes 17-19 with 26 (V2), 30 (Cr2) and 34 (Ni2) valence electrons...

SiH-functional poly(silylated) aromatic hydrocarbons are important starting materials for the preparation of arene-bridged polysilanes through thermal or catalytic dehydrogenative coupling reactions. 

Figure 7 Formation of side-on peroxo intermediate [CujlR-XYL) (02 )] (5 ) from O2-reaction with [Cu (R-XYL)], followed by oxygenation of the arene bridge...

Heterodimetallic complexes with fully conjugated oligoynediyl or diethynyl arene bridges constitute another interesting family of compounds where an assignment of individual redox sites may not be trivial. In these systems, strong... 

Arenes bridging two metal atoms employing only n interactions... 

S. Konrad, C. Nather, U. Liining, Concave reagents, 44 calix[5]- and calix[8]arenes bridged with heterocycles, Eur. J. Org. Chem., 2005, 2330-2337. 

H. Ross, U. Liining, Concave reagents, 19 synthesis, structure and basicity of a calix[6]arene bridged by an aniline, Tetrahedron, 1996, 52, 10879-10882. 

EXAFS measurements indicate that oxygen ligands are trans to phosphorus in the inner coordination sphere. Attempts to crystallize complex (52) led to the formation of an arene-bridged dimer, characterized as... 

Ross. H. Luning. U. Concave reagents. 23 Synthesis of a calix[6]arene bridged by a 1.10-phenanthroline. Tetrahedron Lett. 1997. 38. 4539-4542. 

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