Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Formula: C8H12B2F8N4Pd. Introducing a new discovery about 21797-13-7, Name is Tetrakis(acetonitrile)palladium(II) tetrafluoroborate
Versatile supramolecular coordination behaviour of a bis(bidentate) tetraphosphane
The bis(bidentate) phosphane cis,trans,cis-1,2,3,4- tetrakis(diphenylphosphanyl)cyclobutane (dppcb) has been used for the synthesis of supramolecular complexes, so-called dyads and triads. Depending on the monometallic precursor compound [Ru(bpy)2(dppcb)](PF 6)2 or [Ru(bpy)2(cis-dppcbO2)] (PF6)2 [bpy = 2,2?-bipyridine, cis-dppcbO 2 = cis,trans,cis-1,2-bis(diphenylphosphanoyl)-3,4- bis(diphenylphosphanyl)cyclobutane], [Ru(bpy)2(dppcb)NiBr 2](PF6)2 (1) or DeltaLambda/ LambdaDelta-[{Ru(bpy)2(cis-dppcbO2)} 2NiBr](PF6)5 (2) is exclusively formed in good yield by reaction with [NiBr2(DME)] (DME = dimethoxyethane). The versatile coordination behaviour of dppcb compared with that of cis-dppcbO 2 is confirmed by cis,trans,cis-2,3-bis(diphenylphosphanoyl)-1,4- bis(diphenylphosphanyl)cyclobutane (2,3-trans-dppcbO2, 4). Although two dppcb ligands coordinated simultaneously to a PdII centre cannot produce a square-planar PdP4 core, the reaction of two equivalents of 4 with [Pd(CH3CN)4](BF4)2 exclusively leads to meso-(MMMP/MPPP)-[Pd(2,3-trans-dppcbO2-P, P?)2](BF4)2 (3). This means that trans configurations of coordinating 2,3-trans-dppcbO2 with respect to the cyclobutane rings allow the formation of this PdP4 moiety. However, in the case of 4 it is also possible to obtain [PdCl2(2,3-trans- dppcbO2-P,P?)] (5) in excellent yield by using [PdCl 2(COD)] (COD = cyclooctadiene). In 5, only one ligand 4 is attached to the PdII centre, and a trans configuration of 4 within the five-membered chelate ring can again be seen. All solid-state structures 1-5 have been determined by single-crystal X-ray structure analysis. The corresponding solution structures are in agreement with these solid-state structures and have been authenticated by multinuclear NMR spectroscopy, FAB and MALDI-TOF-MS measurements, UV/Vis spectroscopy and cyclic voltammetry. In the case of 2, the emission and lifetime properties of the excited state indicate that triads such as 2 could be suitable catalysts for the reductive part of water splitting. A bis(bidentate) tetraphosphane produces heterodi- or heterotrinuclear species in one step depending on its oxidation state. These supramolecular arrays consist of chromophores and reactive metal centres. To understand the versatility of the tetraphosphane, a further partly oxidized derivative of it is also investigated. Copyright
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Formula: C8H12B2F8N4Pd, you can also check out more blogs about21797-13-7
Reference£º
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method