Reference of 224311-51-7, Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.224311-51-7, Name is 2-(Di-tert-Butylphosphino)biphenyl, molecular formula is C20H27P. In a patent, introducing its new discovery.
A DFT and crystallographic reinvestigation of the [L2RuC 2B7H9] and [L3RuC2B 7H9] ‘hypercloso’ and closo systems
A reinvestigation of the [LRuC2B7H9] ‘hypercloso’ 10-vertex cluster compounds, where L = PPh3, PEt 3, which were first reported some 30 years ago, has been carried out. At that time no single-crystal X-ray diffraction structural analysis was obtained for the compounds and their description as featuring a ‘hypercloso’ cluster constitution, where the descriptor hypercloso is defined as being a closed polyhedral structure possessing n skeletal bonding electron pairs, where n is the number of vertices, was largely based on a combination of chemical and NMR spectroscopic evidence, together with the application of Polyhedral Skeletal Electron Pair Theory as it was then understood. Reported here is a single-crystal Xray diffraction study of the PPh3 ligated ruthenacarborane allied with density functional calculations (DFT). The cluster structure is shown to be of isocloso geometry, albeit with considerable distortion towards isonido. Addition of excess PMe3 leads to the formation of an [(PMe 3)3RuC2B7H9] species of conventional 10-vertex closo geometry but it undergoes a cluster rearrangement, resulting in a different isomer to that originally proposed. 2011 Elsevier Ltd.
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Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate