nitrogen atom instead of the carbon of the chain‚ are designated by a capital N. Aromatic amines belong to specific families‚ which act as parent molecules. For example‚ an amino group (—NH2) attached to benzene produces the parent compound aniline. Basicity of amines Amines are basic because they possess a pair of unshared electrons‚ which they can share with other atoms. These unshared electrons create an electron density around the nitrogen atom. The greater the electron density
Premium Amine Amide Nitrogen
list examples of semi-permanent haircolor. Student will be able to explain the action of a demi-color. Student will be able to explain the action of oxidative permanent haircolor. Student will list examples of oxidative permanent haircolor. Preparation TEKS Correlations: 125.112(c)(1)(D) …apply the competencies related to resources‚ information‚ systems‚ and technology in appropriate settings and situations… 125.112(c)(1)(E) …demonstrate knowledge of the concepts and skills related to health
Premium Student
triethoxysilyl-functionalized palladium complex immobilized on the surface of magnetite Fe3O4 coated with silica. The significant advantage of this catalyst is retained activity over a number of runs and magnetic recyclability. However catalyst preparation is complex and involves microwave heating and thus cannot be applied industrially. Suzuki couplings are usually carried out in organic solvents or aqueous organic mixed solvents. The chemical reaction involved is as follows: Fig 2.1: Suzuki Coupling
Premium Catalysis Palladium Chemical reaction
PICRIC ACID (DIRECT DYE): Take about 60 mL of water in a 400 mL beaker. Add 2-3 drops of concentrated sulphuric acid and about 0.5 g of Picric Acid to it. Stir the solution with a wooden stick and warm over a hot water bath. Immerse one piece of each wool‚ cotton‚ polyester‚ nylon and terecot into it. When the pieces are thoroughly wetted in dye solution remove these with the help of forceps. Wash these with the help of warm water till the washing is colourless. Dry the pieces and note the results
Premium Dye
Organic Chemistry II Laboratory (ABCT357/ABCT3757) Lab Manual 2014-2015 Lee Hang Wai‚ Alston (alston.lee@polyu.edu.hk) Dr. Lee Cheng Hao‚ Samuel (chenghao.lee@polyu.edu.hk) Organic Chemistry II Laboratory (ABCT357‚ ABCT3757) (Group one) Contact: Alston Lee (alston.lee@polyu.edu.hk) Tuesday 8:30-11:30 ‚ Laboratory: Y1315 Lab supporting staffs: YK Au / Kan Chan/Arnold Demonstrators: Dr. Samuel Lee‚ Alston Lee‚ Fu Wai Chung‚ Guo Shuai‚ Yuen On Ying‚ Sep 16 Tue Acetylation of α-D-glucopyranose (Expt
Premium Acetic acid Acetic anhydride Carboxylic acid
gum arabic powder and icing sugar. For a specifically black polish‚ 280 g (10 oz) of charcoal powder from the chemist may be added at this stage. In recent history the black colour comes from an aniline dye. The next recipe indicates that nigrosene (generically‚ a black dye made from oxidised aniline) was domestically procurable in the 1940s. Note that the above recipe uses potassium carbonate (potash) whereas the following recipe uses potassium bicarbonate‚ which is not potash. Imperial Measures
Premium Water Imperial units Carbon dioxide
impurities with different solubility to separate from the solution in each step. The objective of the experiment was to synthesize acetanilide by the acetylation of aniline and to purify crude acetanilide product by recrystallization. The group determined water as the recrystallizing solvent. The group performed acetylation of aniline and acetic anhydride for the formation of crude acetanilide. The recrystallizing solvent dissolved the crude acetanilide and was heated in a water bath‚ after heating
Premium Solvent Solubility Acetic acid
SYLLABUS CHEMISTRY (043) CLASS-XII – (2012-13) Annexure - ‘ I ’ S.No. 1. 2. 3. 4. Type of Question Long Answers (LA) Short Answers-II (SA II) Short Answers-I (SA-I) Very Short Answer (VSA) Total Marks for No. of Total Marks each Question Questions 5 3 2 1 3 9 10 08 30 15 27 20 08 70 Weightage 4 5 5 5 4 3 8 5 3 4 4 6 4 4 3 3 70 Total: S.No. UNIT 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. Solid State Solutions Electrochemistry Chemical Kinetics Surface Chemistry General Principles
Premium Chemistry Chemical reaction Reaction rate
molar mass for question #9 was determined by experiment to be 60.0 g/mol. What is the molecular formula? 11. Aniline‚ a starting material for urethane plastic foams‚ consists of C‚ H‚ and N. Combustion of such compounds yields CO2‚ H2O‚ and N2 as products. If the combustion of 9.71 g of aniline yields 6.63 g H2O and 1.46 g N2‚ what is its empirical formula? 12. The molar mass of aniline is 93 g/mol. What is its molecular formula? 13. Calculate the mass percent of carbon‚ nitrogen and oxygen
Premium Oxygen
type which involves heating chromium hexacarbonyl under reflux in an excess of the aromatic compound or with a molar quantity in an inert solvent. Shortly after our preliminary communication‚2 Natta and his co-workers also described the direct preparation of several of these compounds‚ but used a pressurised system (with intermittent release of carbon monoxide) and higher temperatures (200-235"). The work of Fischer and his school shows that equilibria are involved in these reactions-an excess of
Premium Benzene Solvent Sulfuric acid