نتایج جستجو برای: cobalt hydrogensulfate

تعداد نتایج: 30353  

Journal: :organic chemistry research 0
hossein eshghi department of chemistry, faculty of science, ferdowsi university of mashhad, mashhad m eftekhar department of chemistry, faculty of sciences, ferdowsi university of mashhad, mashhad 91775-1436, iran. m rahimizadeh department of chemistry, faculty of sciences, ferdowsi university of mashhad, mashhad 91775-1436, iran. m hassanpour department of chemistry, faculty of sciences, ferdowsi university of mashhad, mashhad 91775-1436, iran. m bakavoli department of chemistry, faculty of sciences, ferdowsi university of mashhad, mashhad 91775-1436, iran.

cobalt hydrogensulfate is an efficient catalyst for the condensation of β-naphthol, aromatic aldehydes and 5,5-dimethyl-1,3-cyclohexanedione at 120 °c to afford 9,9-dimethyl-12-phenyl-8,10,11,12-tetrahydro-9-h-benzo[a]xanthen-11-one derivatives in high yields. also, polycondensation reactions of phenols with phthalic anhydride were carried out in the presence of cobalt hydrogensulphate under so...

Journal: :organic chemistry research 2016
hossein eshghi m eftekhar m rahimizadeh m hassanpour m bakavoli

cobalt hydrogensulfate is an efficient catalyst for the condensation of β-naphthol, aromatic aldehydes and 5,5-dimethyl-1,3-cyclohexanedione at 120 °c to afford 9,9-dimethyl-12-phenyl-8,10,11,12-tetrahydro-9-h-benzo[a]xanthen-11-one derivatives in high yields. also, polycondensation reactions of phenols with phthalic anhydride were carried out in the presence of cobalt hydrogensulphate under so...

     Cobalt hydrogensulfate is an efficient catalyst for the condensation of β-naphthol, aromatic aldehydes and 5,5-dimethyl-1,3-cyclohexanedione at 120 °C to afford 9,9-dimethyl-12-phenyl-8,10,11,12-tetrahydro-9-H-benzo[a]xanthen-11-one derivatives in high yields. Also, polycondensation reactions of phenols with phthalic anhydride were carried out in the presence of cobalt hydrogensu...

2011
Hossein Eshghi Seyed Mohammad Seyedi Elaheh Rahimi Zarei

Ferric hydrogensulfate catalyzed the synthesis of 5-substituted 1H-tetrazoles via [2 + 3] cycloaddition of nitriles and sodium azide. This method has the advantages of high yields, simple methodology, and easy workup. The catalyst can be recovered by simple filtration and reused delivering good yields. Also, ferric hydrogensulfate catalyzed the hydrolysis of nitriles to primary amides under aqu...

2008
Gholamhossein Sh. Mohammadnezhad Mostafa M. Amini Hamid Reza Khavasi Seik Weng Ng

The cations and anions of the title salt, 3C(6)H(16)N(+)·HSO(4) (-)·SO(4) (2-), are linked by N-H⋯O and O-H⋯O hydrogen bonds into a three-dimensional network. The hydrogensulfate ion, with a single S-O(H) bond of 1.563 (2) Å, forms a short O-H⋯O hydrogen bond [O⋯O = 2.609 (2) Å] to the sulfate ion. The hydrogensulfate ion accepts two hydrogen bonds from two cations, whereas the sulfate ion, as ...

Journal: :Chemical communications 2005
David Curiel Paul D Beer

A new photo-active rhenium(I) bipyridyl based rotaxane has been synthesised which by virtue of the unique interlocked structural cavity selectively senses hydrogensulfate using luminescence spectroscopy.

Journal: :Acta Crystallographica Section E Structure Reports Online 2013

Journal: :Acta Crystallographica Section E Structure Reports Online 2008

2013
Salem Said Noureddine Mhadhbi Fadhel Hajlaoui Thierry Bataille Houcine Naïli

In the title salt, C10H28N4 (4+)·4HSO4 (-), the cation lies about an inversion center. In the crystal, O-H⋯O and N-H⋯O hydrogen bonds connect the anions and cations, forming a three-dimensional network.

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2010

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید