SDS of cas: 29046-78-4. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Nickel(II) chloride ethylene glycol dimethyl ether complex, is researched, Molecular C4H10Cl2NiO2, CAS is 29046-78-4, about Tetrakis-1,2,4,5-(bis(3,5-dimethylphenyl)phosphino)benzene (Me16tpbz): A soluble and spectroscopically simple variant of the 1,2,4,5-tetraphosphinobenzene ligand platform. Author is Selvachandran, Malathy; Kumar, Satyendra; Zhang, Xiaodong; Mague, Joel T.; Donahue, James P..
A preparation of 1,2,4,5-tetrakis(bis(3,5-dimethylphenyl)phosphino)benzene (Me16tpbz) was devised as a two-step synthesis beginning with bis(3,5-dimethylphenyl)chlorophosphine and 1,2,4,5-tetrafluorobenzene, albeit in low overall yield of 10%. The crystal structure of Me16tpbz reveals slight pushing of the P atoms above and below the central arene ring, suggesting the effect of slight steric pressure, as compared to the fully planar C6P4 core found in 1,2,4,5-tetrakis(diphenylphosphino)benzene (tpbz). Upon exposure to air, solution samples of Me16tpbz degrade to (3,5-Me2C6H3)2PP(O)(C6H3-3,5-Me2)2, identified by x-ray crystallog., which suggests P-C bond scission is a decomposition pathway. The dinickel compound [(mnt)Ni(Me16tpbz)Ni(mnt)] (mnt(2-) = [(NC)2C2S2]2-) was structurally characterized by x-ray crystallog. and reveals a chair-like conformation defined by a 32.3° angle between the NiP2 planes with respect to the central C6P4 mean plane. Compared to the analogous [(mnt)Ni(tpbz)Ni(mnt)], slightly weaker binding of Me16tpbz to Ni is implied by its modestly longer Ni-P bond lengths. The cyclic voltammogram of [(mnt)Ni(Me16tpbz)Ni(mnt)] in CH2Cl2 shows reversible reductions at ∼-1.01 V and -1.21 V, corresponding to sequential Ni2+ + e- → Ni1+ processes, while in DMF, under conditions where [(mnt)Ni(tpbz)Ni(mnt)] shows multiple, reversible reduction processes, its behavior is irreversible and more complex.
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