Desymmetrization on both ligands of pentaphenylcyclopentadienylhydrotris(indazolyl) borate ruthenium(II) complexes: Prototypes of organometallic molecular gears and motors

Pentacarboxycyclopentadienes in Organic Synthesis

“…Halocyclopentadienes are an important class of precursors of Cp compounds and their metal complexes [15,16,[113][114][115][116]. According to DFT calculations, the iodocyclopentadiene molecule in a rotating electric fi eld is a prototype of a molecular rotary motor with a fast (k 25°C 630 s -1 ) unidirectional movement of iodine along the Cp ring [117].…”

“…Pentasubstituted cyclopentadienes (Cp) with alkyl, aryl, benzyl, halogen-, cyano-, and other substituents in the fi ve-membered ring are popular organic ligands which form various metal complexes widely used as catalysts for C-H bond functionalization [1][2][3], cycloaddition reactions [4,5], olefi n polymerization [6,7], and other processes [8] and are also used to create materials for chemosensorics [9], molecular electronics [10][11][12], and spintronics [13,14]. Such compounds are more stable than unsubstituted Cp derivatives and have a wide range of useful properties [15][16][17][18][19][20][21][22][23][24][25].…”

Design and Synthesis of a Nano-winch

“…Since the early 2000s, our group has designed and synthesized a series of electrically-driven azimuthal rotors, [35][36][37] to be studied on surface as single molecules [30,31] or as self-assemblies [38] by means of STM. Electric energy delivered by the STM tip is converted into a rotation movement, which was shown to be unidirectional and reversible in the case of a piano-stool ruthenium complex incorporating a dissymmetric rotor subunit (Figure 1).…”

Scorpionate Hydrotris(indazolyl)borate Ligands as Tripodal Platforms for Surface‐Mounted Molecular Gears and Motors

“…Indeed, in the vertical setup involving the STM tip and the metallic surface as nanoelectrodes, the position of the motor relative to the nanojunction cannot be used to provide the element of dissymmetry necessary for unidirectional rotation. As a consequence, the requested element of dissymmetry has to be included in the molecular design of the motor, either in the stator or the rotor subunit . In view of the attractive possibility of having a direct probe for rotation when using a dissymmetric rotor, our efforts were focused on the design of a new rotor bearing one tagged arm.…”