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Phosphazenes are a class of chemical compounds in which a phosphorus atom is covalently linked to a nitrogen atom by a double bond and to three other atoms or radicals by single bonds. While other substitutions produce relatively persistent compounds, in organic synthesis the term largely refers to species with three amino substituents bound to phosphorus. The compounds are unusually stable examples of the phosphorane class of molecules and have a remarkable proton affinity. As such, they are one of the eminent examples of neutral, organic superbases. Two examples are hexachlorocyclotriphosphazene and bis(triphenylphosphine)iminium chloride. Phosphazenes are also known as iminophosphoranes and phosphine imides . The corresponding polymers are polyphosphazenes. Phosphazene bases Phosphazene bases are strong non-metallic non-ionic and low-nucleophilic bases. They are stronger bases than regular amine or amidine bases such as Hünig's base or DBU. Protonation takes place at a ...

Trifluoromethanesulfonic acid IUPAC name Trifluoromethanesulfonic acid Other names Triflic acid Identifiers CAS number 1493-13-6   PubChem 62406 ChemSpider 56192   ChEBI CHEBI:48511   Jmol -3D images Image 1 Properties Molecular formula CF 3 SO 3 H Molar mass 150.08 g/mol Appearance Colorless liquid Density 1.696 g/mL Melting point -40 °C Boiling point 162 °C Solubility in water Miscible Hazards Main hazards Corrosive, eye irritant   (what is this?)    (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references Trifluoromethanesulfonic acid , also known as triflic acid , TFMS , TFSA , HOTf or TfOH , is a sulfonic acid with the chemical formula CF 3 SO 3 H. It is one of the strongest acids . Triflic acid is mainly used in research as a catalyst for esterification . ...

Superacid adalah asam yang lebih kuat dari asam sulfat 100%. Bahkan, beberapa diantaranya bisa mencapai 10 7 sampai 10 9 kali lebih kuat. Ada empat macam superacid: Bronsted, Lewis, konjugat Bronsted-Lewis, dan superacid padat. Superacid Bronsted yang umum adalah asam perklorat (HClO 4 ). Ketika dilarutkan dalam asam sulfat murni, asam sulfat malah bertindak sebagai basa:

The Mannich reaction is an organic reaction which consists of an amino alkylation of an acidic proton placed next to a carbonyl functional group with formaldehyde and ammonia or any primary or secondary amine . The final product is a β-amino-carbonyl compound also known as a Mannich base . Reactions between aldimines and α-methylene carbonyls are also considered Mannich reactions because these imines form between amines and aldehydes. The reaction is named after chemist Carl Mannich . [2] [3]

July 1, 2011 With summer in full swing in much of the world, we take stock of the first half of the International Year of Chemistry. Fabienne Meyers, Associate Director, IUPAC Summer is definitely here in the Northern Hemisphere, which for many means it’s time to take a break and relax. For some the summer is also a good time to reset projects, get back on track, make assessments, or/and make new plans. So, in that spirit, let’s take a look at where we stand at the halfway point of the International Year of Chemistry.

Tangerang -- In Thursday (21/07) around 19.00 WIB Indonesian Chemistry Olympiad Team arrived at Soekarno-Hatta International Airport. This team finished their job at 43rd International Chemistry Olympiad that was held in Ankara, Turkey from 9-18 July 2011. In this year, for the 15th times Indonesia sent their delegation and they were: Stephen Haniel Yuwono (SMAN 1 Purwokerto) Alimatun Nashira (SMAN 1 Yogyakarta) Andhika Tangguh Pradana (SMA Kharisma Bangsa) Joses Grady Nathanael (SMAK BPK Penabur Gading Serpong)

IUPAC name 2,2-Dimethyl-1,3-dioxane-4,6-dione Identifiers CAS number 2033-24-1 PubChem 16249 Properties Molecular formula C 6 H 8 O 4 Molar mass 144.13 g mol −1 Melting point 94-95 °C (decomposes) Acidity (p K a ) 4.97 Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Meldrum's acid or 2,2-dimethyl-1,3-dioxane-4,6-dione is an organic compound . The compound was first made in 1908 by Andrew Norman Meldrum by a condensation reaction of malonic acid with acetone in acetic anhydride and sulfuric acid . Meldrum misidentified the structure as a β- lactone of β-hydroxyisopropylmalonic acid. The correct structure is shown on this page. The synthesis of Meldrum's acid.