Molecular rectangle

IX.C. The spectra and electrochemistry of molecular rectangles containing Ph2C CC=CPPh2 and RuCl(tpy) groups have been described... 

A fluorescent cationic tetranuclear gold(I) rectangle, [(/v-Ph2PAnPPh2)Au2 (//-4,4,-bpy)2Au2(/i.-Ph2PAnr,Ph2)]X4 (X = PF6, NO3), was assembled using 9,10-bis(diphenylphosphino)anthracene and 4,4/-bipyridyl [124]. The molecular rectangle has a cavity of 7.921(3) x 16.76(3) A as reflected from its crystal structure, and its complexation behavior towards various aromatic molecules at the cavity was demonstrated. 

Thanasekaran P, Liao R-T, Liu Y-H, Rajendran T, Rajagopal S, Lu K-L (2005) Metal-containing molecular rectangles synthesis and photophysical properties. Coord Chem Rev 249 1085-1110... 

The molecular rectangle 29 can behave as an electron reservoir by undergoing stepwise reversible oxidation or reduction <2002IC4025>. The anthracene functionality is believed to be involved in the oxidation while the bipyridyl ligand is responsible for the reduction. 

Fig. 14. Rhenium molecular rectangle (a), square (b), triangle (c), and Re/Pd square (d).

Ketones in 120° sp configuration can give molecular hexagons (Scheme 48). Less symmetric molecular rectangles can be achieved by the reaction of a designed diplatinum clip and linear bridging ligands (Scheme 49). Similar... 

Benkstein, K.D., C.L. Stem, K.E. Splan, R.C. Johnson, K.A. Walters, F.M.W. Vanhelmont, and J.T. Hupp (2002). Collapsed molecular rectangles based on rhenium(I) coordination of ethynylpyridyl porphyrins—synthesis, structure, and bending-induced charge-transfer behaviour. Eur. J. Inorg. Chem. (11), 2818-2822. 

Shape-selective Transport of Redox-active Species through Thin Films of Molecular Rectangles... 

Ohkita M, Ando K, Yamamoto K-i, Suzuki T, Tsuji T (2000) First Dewar benzene approach to acetylenic oligophenylene macrocycles synthesis and structure of a molecular rectangle bearing two spindles. Chem Commun (l) 83-84... 

Bipyridine-bridged [Mn(l) and Re(l)] molecular rectangles QCM Toluene 4-fluorotoluene benzene fluorobenzene Adsorption Benkstein et al. (2000)... 

Wu H-C, Thanasekaran P, Tsai C-H et al (2006) Self-assembly, reorganization, and photophysical properties of silver(I)-schiff-base molecular rectangle and polymeric array species. Inorg Chem 45 295-303... 

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