Safety of Diiodo(1,5-cyclooctadiene)platinum(II). The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Diiodo(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12I2Pt, CAS is 12266-72-7, about Chemistry of o-xylidene-metal complexes. Part 1. o-Xylidene-magnesium reagents as metallocyclic precursors and synthesis of cyclo-μ-(o-phenylenedimethylene)(1,5-cyclooctadiene)platinum: the x-ray crystal structure of the macrometallocycle cyclotris[μ-(o-phenylenedimethylene-Cα,Cα’)bis(tetrahydrofuran)magnesium]. Author is Lappert, Michael F.; Martin, Tony R.; Raston, Colin L.; Skelton, Brian W.; White, Allan H..
A high-yield synthesis of a THF solution of the di-Grignard reagent [I; o-(ClMgCH2)2C6H4] from o-(ClCH2)2C6H4 is described, as well as that of an analog obtained from 1,2-(ClCH2)2C6H2Me2-4,5. Cooling I to ∼-40° gives colorless Mg(CH2C6H4CH2-o)L (L = THF) of unknown structure, whereas at ambient temperature a concentrated solution (≳0.1 mol/dm3) slowly deposits colorless needles of [Mg(CH2C6H4CH2-o)L2]3 (II). The crystal and mol. structure of II was determined by x-ray diffraction and refined by least squares to R 0.054 for 1117 observed reflections. The mol. is a trimer, the trimeric unit lying on a crystallog. 2-fold axis. Each of the 3 Mg atoms is bridged to the other 2 by a CH2C6H4CH2 ligand, and the pseudotetrahedral coordination about each Mg is completed by a pair of THF mols. The utility of I as a metallocycle precursor is shown by synthesis of the cyclic complex (COD)Pt(CH2C6H4CH2-o) (COD = 1,5-cyclooctadiene) from (COD)PtI2. In contrast, the Li reagent [C6H4(CHSiMe3)2-o][LiL1]2 [L1 = Me2N(CH2)2NMe2] reacts with (dppe)PtCl2 [dppe = Ph2P(CH2)2PPh2] to give (dppe)2Pt.
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