نتایج جستجو برای: 2 diaminium trifluoroacetate tmbsedtfa2
تعداد نتایج: 2525471 فیلتر نتایج به سال:
Both alkylarylalkynes and diarylalkynes 1 are converted into the α-diketones 2 in good yield by the use of mercuric salts, e.g., mercuric nitrate hydrate or mercuric triflate, in the presence of water. Other mercuric salts, e.g., sulfate, chloride, acetate, or trifluoroacetate, do not provide the diketone product. A possible mechanism is proposed.
In the title salt, C(4)H(14)N(2) (+)·2C(9)H(3)Cl(4)O(4) (-), the cation lies on an inversion center. In the anion, the mean planes of meth-oxy-carbonyl and carboxyl-ate groups form dihedral angles of 64.9 (3) and 58.5 (3)°, respectively, with the benzene ring. In the crystal, inter-molecular N-H⋯O hydrogen bonds connect the components into sheets parallel to (100).
Complex [Au{4-C(6)F(4)(4-C(6)BrF(4))}(tht)] reacts with diphosphines (L-L) such as bis(diphenylphosphino)methane (dppm) or 1,2-bis(diphenylphosphino)benzene (dppb) in a 2 : 1 molar ratio in dichloromethane, leading to neutral products of stoichiometry [(Au{4-C(6)F(4)(4-C(6)BrF(4))})(2)(μ-L-L)] (L-L = dppm (1), dppb (2)). In the crystal structure of complex 2 short Au···Au interactions of 2.9367...
In the anion of the title salt, C(6)H(18)N(2) (2+)·2C(9)H(3)Cl(4)O(4) (-), the meth-oxy-carbonyl and carboxyl groups are aligned at dihedral angles of 71.0 (3) and 100.9 (3)°, respectively, with the aromatic ring. The asymmetric unit contains half a cation and one anion. In the crystal, inter-molecular N-H⋯O, C-H⋯Cl and C-H⋯O hydrogen bonds link the components into a three-dimensional network.
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