Abstract
Complexation of the 8,8′-bis(methylsulfanyl) derivatives of cobalt and iron bis(dicarbollides) [8,8′-(MeS)2-3,3′-M(1,2-C2B9H10)2]− (M = Co, Fe) with copper, silver, palladium and rhodium leads to the formation of the corresponding chelate complexes, which is accompanied by a transition from the transoid to the cisoid conformation of the bis(dicarbollide) complex. This transition is reversible and can be used in design of coordination-driven molecular switches based on transition metal bis(dicarbollide) complexes. The solid-state structures of {(Ph3P)ClPd[8,8′- (MeS)2-3,3′-Co(1,2-C2B9H10)2-κ2-S,S′]} and {(COD)Rh[8,8′-(MeS)2-3,3′-Co(1,2-C2B9H10)2-κ2-S,S′]} were determined by single crystal X-ray diffraction.
Highlights
The design of molecular machines—molecules or molecular complexes that are capable of performing quasi-mechanical movement to do useful work—is one of the most attractive and rapidly developing areas of modern chemistry [1,2,3,4]
The most studied are molecular switches based on organic molecules, including photochromic molecular switches based on azobenzenes, stilbenes, dithienylethenes, spiropyrans, and spirooxazines, as well as switches based on mechanically interlocked molecular systems, rotoxanes and catenanes, in which the Molecules 2020, 25, 5745; doi:10.3390/molecules25235745
In this contribution we report the complexation of cobalt and iron bis(dicarbollides) with some transition metals, including copper, silver, palladium and rhodium
Summary
The design of molecular machines—molecules or molecular complexes that are capable of performing quasi-mechanical movement to do useful work—is one of the most attractive and rapidly developing areas of modern chemistry [1,2,3,4]. We proposed the 8,80 -bis(methylsulfanyl) derivatives of cobalt, iron and nickel bis(dicarbollides) as organometallic modules for complexation driven molecular switches These derivatives adopt the transoid configuration with the dicarbollide ligands rotated 180◦ relative to each other due to the formation of weak intramolecular hydrogen bonds CH . Since thioesters are weak ligands, the addition of a stronger ligand should lead to release of the 8,80 -bis(methylsulfanyl) bid(dicarbollides) from the coordination sphere of the metal with their reverse transition from the cisoid to the transoid conformation. In this contribution we report the complexation of cobalt and iron bis(dicarbollides) with some transition metals, including copper, silver, palladium and rhodium
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