5.3.1 Transition Elements 2012
... which are non-super imposable and will rotate the plane of polarised light in opposite directions. The central ion is not described as chiral; this term is reserved for organic molecules only. On the next page is a diagram showing the two isomers from a complex with three ethanediamine (en) ligands ...
... which are non-super imposable and will rotate the plane of polarised light in opposite directions. The central ion is not described as chiral; this term is reserved for organic molecules only. On the next page is a diagram showing the two isomers from a complex with three ethanediamine (en) ligands ...
CHEM1002 2014-N-3 November 2014 • Transition metals are often
... The pKa of uncoordinated water is 15.7 but the pKa of the water in carbonic anhydrase is around 7. Suggest an explanation for this large change. The high charge on the Zn2+ ion draws electron density out of the O–H bonds in the water molecule. This weakens the O–H so the H+ is more likely to leave. ...
... The pKa of uncoordinated water is 15.7 but the pKa of the water in carbonic anhydrase is around 7. Suggest an explanation for this large change. The high charge on the Zn2+ ion draws electron density out of the O–H bonds in the water molecule. This weakens the O–H so the H+ is more likely to leave. ...
2010 - SAASTA
... ever discovered. It may be considered to be the highest grade of coal, just above anthracite, although it is not normally used as fuel because it is hard to ignite. Graphite is the substance used as the marking material ("lead") in common pencils. In its pure glassy (isotropic) synthetic forms, pyro ...
... ever discovered. It may be considered to be the highest grade of coal, just above anthracite, although it is not normally used as fuel because it is hard to ignite. Graphite is the substance used as the marking material ("lead") in common pencils. In its pure glassy (isotropic) synthetic forms, pyro ...
Time
... - explain the factors which effect reaction rates; predicting rate of reactions - concentration vs time graphs – instantaneous rate of reaction - use activation energy diagrams and kinetic energy diagrams to show effect of temperature and catalysts on reaction rate - explain reaction rates in terms ...
... - explain the factors which effect reaction rates; predicting rate of reactions - concentration vs time graphs – instantaneous rate of reaction - use activation energy diagrams and kinetic energy diagrams to show effect of temperature and catalysts on reaction rate - explain reaction rates in terms ...
PPA 1. Testing for Unsaturation
... Cracking is important because it produces smaller chain hydrocarbons for which there is a greater demand. Secondly, it produces unsaturated hydrocarbons, which are important starting materials in the manufacture of plastics. The set up for the experiment is as follows: ...
... Cracking is important because it produces smaller chain hydrocarbons for which there is a greater demand. Secondly, it produces unsaturated hydrocarbons, which are important starting materials in the manufacture of plastics. The set up for the experiment is as follows: ...
ALKANE ALKYL HALIDE Halogenation of Alkanes
... reagents: 1) CH2N2 (diazomethane), heat carbene mechanism (write on back of card) 2) CH2I2, Zn/Hg (Simmons-Smith reaction) gives fewer side products 3) CHCl3, (CH3)3COK carbene mechanism (write on back of card) two of the halogens remain attached not subject to rearrangements ...
... reagents: 1) CH2N2 (diazomethane), heat carbene mechanism (write on back of card) 2) CH2I2, Zn/Hg (Simmons-Smith reaction) gives fewer side products 3) CHCl3, (CH3)3COK carbene mechanism (write on back of card) two of the halogens remain attached not subject to rearrangements ...
Chapter 6: Chemical Equilibrium
... a. the rate of consumption of each of the product species by the reverse reaction is equal to the rate of production of each of the reactant species by the reverse reaction. b. the sum of the concentrations of each of the reactant species is equal to the sum of the concentrations of each of the prod ...
... a. the rate of consumption of each of the product species by the reverse reaction is equal to the rate of production of each of the reactant species by the reverse reaction. b. the sum of the concentrations of each of the reactant species is equal to the sum of the concentrations of each of the prod ...
File
... 6. Which metal nitrate solution is coloured? A. Zn(NO3)2(aq) B. Ni(NO3)2(aq) C. Mg(NO3)2(aq) D. Ca(NO3)3(aq) 7. Ligands can form dative covalent bonds with metal ions to form complex ions. Which of the following can act as a ligand? I. Cl– II. NH3 III. H2O A. I and II only B. I and III only C. II an ...
... 6. Which metal nitrate solution is coloured? A. Zn(NO3)2(aq) B. Ni(NO3)2(aq) C. Mg(NO3)2(aq) D. Ca(NO3)3(aq) 7. Ligands can form dative covalent bonds with metal ions to form complex ions. Which of the following can act as a ligand? I. Cl– II. NH3 III. H2O A. I and II only B. I and III only C. II an ...
S8 + ___ F2 → ___ SF6 - Canvas by Instructure
... __ H+ + __ Cr2O72- + __C2H5OH __ Cr3+ + __ H2O + __ CO2 (Note: this is a net ionic equation – number of atoms & CHARGE must be balanced.) ...
... __ H+ + __ Cr2O72- + __C2H5OH __ Cr3+ + __ H2O + __ CO2 (Note: this is a net ionic equation – number of atoms & CHARGE must be balanced.) ...
Complexometric titration
... with EDTA is titrated without the addition of a complex-forming indicator, and if a titration error of 0.1 per cent ispermissible, then the ratio of the stability constants of the EDTA complexesof the two metals M and N must be such that KM/KN > 106 if N is not to interfere with the titration of M. ...
... with EDTA is titrated without the addition of a complex-forming indicator, and if a titration error of 0.1 per cent ispermissible, then the ratio of the stability constants of the EDTA complexesof the two metals M and N must be such that KM/KN > 106 if N is not to interfere with the titration of M. ...
delhi private school
... Q11. How will you distinguish between the following: 3 marks (i) Propanoic acid and propanal (ii) Ethanal and Benzaldehyde (iii) Pentan-3-one and Pentan-2-one Q12. How will you bring about the following conversions in not more than two steps. (a) Propanone to Propene (b) Benzene to m-Nitroacetophen ...
... Q11. How will you distinguish between the following: 3 marks (i) Propanoic acid and propanal (ii) Ethanal and Benzaldehyde (iii) Pentan-3-one and Pentan-2-one Q12. How will you bring about the following conversions in not more than two steps. (a) Propanone to Propene (b) Benzene to m-Nitroacetophen ...
Hydrogeochemistry - University of Florida College of
... These differences mean cations typically surrounded by several large coordinating ligands ...
... These differences mean cations typically surrounded by several large coordinating ligands ...
chemistry-igcse8
... More reactive elements have a greater desire to have a full outer shell, so also form more stable compounds. 3.2 Bonding: the structure of matter Element: a substance that cannot be split into anything simpler, in a chemical reaction. Each element has a unique proton number. Mixture: two or more ele ...
... More reactive elements have a greater desire to have a full outer shell, so also form more stable compounds. 3.2 Bonding: the structure of matter Element: a substance that cannot be split into anything simpler, in a chemical reaction. Each element has a unique proton number. Mixture: two or more ele ...
Reaction mechanism of Coordination Complexes
... Reaction mechanism of Coordination Complexes Complexes are classified as Inert and Labile ( kinetic stability) depending on their reactivity. According to Henry Taube, a Nobel Laureate, the definition is ...
... Reaction mechanism of Coordination Complexes Complexes are classified as Inert and Labile ( kinetic stability) depending on their reactivity. According to Henry Taube, a Nobel Laureate, the definition is ...
Unsaturated hydrocarbons Alkenes
... 6. Oxidation of Alkenes(visual test for unsaturation) A simple visual test can be used to detect unsaturation: Alkenes can easily be oxidized by potassium permanganate (KMnO4) and other oxidizing agents. When alkenes are added to the purple alkaline potassium manganate, there is a color change to b ...
... 6. Oxidation of Alkenes(visual test for unsaturation) A simple visual test can be used to detect unsaturation: Alkenes can easily be oxidized by potassium permanganate (KMnO4) and other oxidizing agents. When alkenes are added to the purple alkaline potassium manganate, there is a color change to b ...
Chapter 20: Reactions of Complexes (Mechanisms)
... Studying the mechanism may involve altering the physical conditions (T, P, solvent) but this may complicate matters Often, trends can be obtained by “fine‐tuning” the ligand. Most useful are NR3 and PR3 ligands, where R groups are easily changed to vary the nucleophilicity of the donor atom witho ...
... Studying the mechanism may involve altering the physical conditions (T, P, solvent) but this may complicate matters Often, trends can be obtained by “fine‐tuning” the ligand. Most useful are NR3 and PR3 ligands, where R groups are easily changed to vary the nucleophilicity of the donor atom witho ...
Physical Science Chapter 7 Chemical Reactions Section 7.1
... A reaction in which __________________________________________________________________is called an oxidation-reduction reaction, or _________________________________. Oxidation For a long time, people have known that metals react with oxygen. Calcium reacts with oxygen and forms calcium oxide (CaO). ...
... A reaction in which __________________________________________________________________is called an oxidation-reduction reaction, or _________________________________. Oxidation For a long time, people have known that metals react with oxygen. Calcium reacts with oxygen and forms calcium oxide (CaO). ...
Periodicity Notes
... a. definition - catalyst changes rate of rxn without itself becoming changed in the rxn b. reason that transition catalyst forms - complex ions can form (between transition metal and ligands that donate a pair of electrons) The reactant can cling temporarily (reversibly) to the complex ion and the c ...
... a. definition - catalyst changes rate of rxn without itself becoming changed in the rxn b. reason that transition catalyst forms - complex ions can form (between transition metal and ligands that donate a pair of electrons) The reactant can cling temporarily (reversibly) to the complex ion and the c ...
Understanding d0-Olefin Metathesis Catalysts: Which Metal, Which
... account for the efficiency of a family of molecular and silicagrafted (R3O)M(tER1)(dCHtBu)(CH2tBu) complexes (M ) Mo and W; E ) N; M ) Re, E ) C), being unsymmetrical (X ) CH2tBu and Y ) OR3),6,15-24 which are sometimes better catalysts than the symmetrical bisalkoxy complexes, M(tER1)(dCHtBu)(OR)2. ...
... account for the efficiency of a family of molecular and silicagrafted (R3O)M(tER1)(dCHtBu)(CH2tBu) complexes (M ) Mo and W; E ) N; M ) Re, E ) C), being unsymmetrical (X ) CH2tBu and Y ) OR3),6,15-24 which are sometimes better catalysts than the symmetrical bisalkoxy complexes, M(tER1)(dCHtBu)(OR)2. ...
principle group
... 1) Identify the longest carbon chain containing the sulfhydryl group. Name this chain and add “thiol” to the end (no space). 2) Number the chain so that the carbon connected to the –SH group has the lowest number possible 3) Name and number all of the substituents and place them, in alphabetical ord ...
... 1) Identify the longest carbon chain containing the sulfhydryl group. Name this chain and add “thiol” to the end (no space). 2) Number the chain so that the carbon connected to the –SH group has the lowest number possible 3) Name and number all of the substituents and place them, in alphabetical ord ...
Chapter 5 Chemical Equilibrium 1 State whether each of the
... (c) You should have found that Hvap is smaller at the higher temperature. Why is this so? This is because at higher temperature, the water molecules already have higher energy, so less is required to vaporize them from the liquid into the gas phase. ...
... (c) You should have found that Hvap is smaller at the higher temperature. Why is this so? This is because at higher temperature, the water molecules already have higher energy, so less is required to vaporize them from the liquid into the gas phase. ...
PowerPoint 簡報
... Alcohols and Water • alcohols are “monosubstituted” water, ROH, hydrocarbon radical, R, substituted for one of the hydrogen atoms in water, HOH • alcohols form hydrogen bonds to other alcohol molecules, increasing boiling point, and to water, making them very soluble in water ...
... Alcohols and Water • alcohols are “monosubstituted” water, ROH, hydrocarbon radical, R, substituted for one of the hydrogen atoms in water, HOH • alcohols form hydrogen bonds to other alcohol molecules, increasing boiling point, and to water, making them very soluble in water ...
Chemical Equilibrium Review Ch 13-14 2015
... 7. A gaseous mixture contains 0.30mol CO, 0.10mol H2, and 0.020mol H2O, plus an unknown amount of CH4, per liter. This mixture is at equilibrium at 1200.K. CO(g) + 3H2(g) CH4(g) + H2O(g) The equilibrium constant Kc = 3.92. What is the equilibrium concentration of CH4 in this mixture? 8. The reactio ...
... 7. A gaseous mixture contains 0.30mol CO, 0.10mol H2, and 0.020mol H2O, plus an unknown amount of CH4, per liter. This mixture is at equilibrium at 1200.K. CO(g) + 3H2(g) CH4(g) + H2O(g) The equilibrium constant Kc = 3.92. What is the equilibrium concentration of CH4 in this mixture? 8. The reactio ...
Hydroformylation
Hydroformylation, also known as oxo synthesis or oxo process, is an important homogeneously catalyzed industrial process for the production of aldehydes from alkenes. This chemical reaction entails the addition of a formyl group (CHO) and a hydrogen atom to a carbon-carbon double bond. This process has undergone continuous growth since its invention in 1938: Production capacity reached 6.6×106 tons in 1995. It is important because the resulting aldehydes are easily converted into many secondary products. For example, the resulting aldehydes are hydrogenated to alcohols that are converted to plasticizers or detergents. Hydroformylation is also used in specialty chemicals, relevant to the organic synthesis of fragrances and natural products. The development of hydroformylation, which originated within the German coal-based industry, is considered one of the premier achievements of 20th-century industrial chemistry.The process typically entails treatment of an alkene with high pressures (between 10 to 100 atmospheres) of carbon monoxide and hydrogen at temperatures between 40 and 200 °C. Transition metal catalysts are required.