Lecture Notes
... You’ve got to complex like EDTA, You’ve got to complex like EDTA; It replaces all six H2Os separately, So the entropy must increase! You’ve got to complex like EDTA, You’ve got to complex like EDTA; It’s the chelate effect! It’s a favoured process! It’s a positive delta S! III Ligands can you act as ...
... You’ve got to complex like EDTA, You’ve got to complex like EDTA; It replaces all six H2Os separately, So the entropy must increase! You’ve got to complex like EDTA, You’ve got to complex like EDTA; It’s the chelate effect! It’s a favoured process! It’s a positive delta S! III Ligands can you act as ...
Organic Compounds - 2012 Book Archive
... aryl halides. Oxygen-containing organic compounds, a third family, may be divided into two main types: those that contain at least one C–O bond, which include alcohols, phenols (derivatives of benzene), and ethers, and those that contain a carbonyl group (C=O), which include aldehydes, ketones, and ...
... aryl halides. Oxygen-containing organic compounds, a third family, may be divided into two main types: those that contain at least one C–O bond, which include alcohols, phenols (derivatives of benzene), and ethers, and those that contain a carbonyl group (C=O), which include aldehydes, ketones, and ...
Module 2 Asymmetric Carbon-Carbon Bond Forming Reactions
... Scheme 6 presents examples for the Mo and Ru-catalyzed enantioselective ROCM processes. Norbornenes react with styrene via ROCM with high enantioselectivities. In both cases, E-alkenes are generated. In the absence of styrene, in the case of Mo-based system, RORCM product is formed with 92% ee. The ...
... Scheme 6 presents examples for the Mo and Ru-catalyzed enantioselective ROCM processes. Norbornenes react with styrene via ROCM with high enantioselectivities. In both cases, E-alkenes are generated. In the absence of styrene, in the case of Mo-based system, RORCM product is formed with 92% ee. The ...
The Transition Metal-Nitrogen Multiple Bond
... isocyanate is formed by anionotropic migration of the group R: R-CO-Nj ...
... isocyanate is formed by anionotropic migration of the group R: R-CO-Nj ...
Electrode Potentials
... The oxidation number is used to express the oxidation state of an element, whether as the uncombined element or when combined in a compound; it consists of a + or – sign followed by a number, or it is zero. Atoms of elements have no overall charge and are therefore given an oxidation number of zero. ...
... The oxidation number is used to express the oxidation state of an element, whether as the uncombined element or when combined in a compound; it consists of a + or – sign followed by a number, or it is zero. Atoms of elements have no overall charge and are therefore given an oxidation number of zero. ...
Surface Facet of Palladium Nanocrystals
... molecules is caused by species evolved from O2, as the oxidation rate is highly dependent on the environmental oxygen concentration (see Figure 1c). Taken together, the results reveal that both the two nanostructures can generate active oxygen species from the O2 dissolved in water but exhibit differ ...
... molecules is caused by species evolved from O2, as the oxidation rate is highly dependent on the environmental oxygen concentration (see Figure 1c). Taken together, the results reveal that both the two nanostructures can generate active oxygen species from the O2 dissolved in water but exhibit differ ...
Promazine, metal complexes, synthesis, characterization, elemental
... transitions[15-23]. The molar absorptivities (Ɛ) of the complexes falling in the range of 5.8 x 103 to 4.55 x 104 M-1 cm-1, are higher than those of the ligand in the free state which are 2.2 x 103 M-1 cm-1 and 1.42 x 104 M-1 cm-1 at 306.5 nm and 259 nm, respectively. The increased molar absorptivit ...
... transitions[15-23]. The molar absorptivities (Ɛ) of the complexes falling in the range of 5.8 x 103 to 4.55 x 104 M-1 cm-1, are higher than those of the ligand in the free state which are 2.2 x 103 M-1 cm-1 and 1.42 x 104 M-1 cm-1 at 306.5 nm and 259 nm, respectively. The increased molar absorptivit ...
Binuclear Metal Carbonyl DAB Complexes. III. Activation of a C=N
... The spectroscopic properties of Ru,(CO),(DAB) show that these complexes are isostructural to Fe,(CO),(DAB) of which a crystal structure is known [7]. In these complexes the DAB ligand is a six electron donor including one pair of nelectrons. Apart from the crystal structure of Fe,(CO),(c-hexN=CH-CH= ...
... The spectroscopic properties of Ru,(CO),(DAB) show that these complexes are isostructural to Fe,(CO),(DAB) of which a crystal structure is known [7]. In these complexes the DAB ligand is a six electron donor including one pair of nelectrons. Apart from the crystal structure of Fe,(CO),(c-hexN=CH-CH= ...
Mock Examination (2016/2017) CHEMISTRY PAPER 1 SECTION B
... Name the ionic compound present in aqueous layer after Step 2. Sodium carbonate, sodium ethanoate ...
... Name the ionic compound present in aqueous layer after Step 2. Sodium carbonate, sodium ethanoate ...
complexes of transition metals with uramildiacetic acid
... The stability constants of the complexes of uramildiacetic acid with several metals are summarized in Tables I and II. The values obtained in the present and previous works show clearly the strong complexing properties of this ligand, even towards potassium and beryllium ions. For the transition and ...
... The stability constants of the complexes of uramildiacetic acid with several metals are summarized in Tables I and II. The values obtained in the present and previous works show clearly the strong complexing properties of this ligand, even towards potassium and beryllium ions. For the transition and ...
Selective Incorporation of Difluoromethylene
... they prepared a single-component palladacyclic complex containing P(t-Bu) Cy2 as dative ligand. A range of functionalities were tolerated under these reaction conditions. It is noteworthy that both aryl bromide and aryl chloride could be efficiently transformed with low catalyst loading even in larg ...
... they prepared a single-component palladacyclic complex containing P(t-Bu) Cy2 as dative ligand. A range of functionalities were tolerated under these reaction conditions. It is noteworthy that both aryl bromide and aryl chloride could be efficiently transformed with low catalyst loading even in larg ...
Stoichiometry Notes
... At STP/NTP one mole of any gas contains 22.4 L i.e. at 273 K and 1 atm pressure. Mole concept is based on balanced chemical reaction. If amounts of both reactants are given then find the limiting reagent. It is that reagent which is consumed completely in a irreversible chemical reaction. Class Disc ...
... At STP/NTP one mole of any gas contains 22.4 L i.e. at 273 K and 1 atm pressure. Mole concept is based on balanced chemical reaction. If amounts of both reactants are given then find the limiting reagent. It is that reagent which is consumed completely in a irreversible chemical reaction. Class Disc ...
DMF
... Dimethylformamide is a polar (hydrophilic) aprotic solvent with a high boiling point. It facilitates reactions that follow polar mechanisms, such as SN2 reactions. Dimethylformamide can be synthesized from methyl formate anddimethylamine or by reaction of dimethylamine with carbon monoxide. Dimethyl ...
... Dimethylformamide is a polar (hydrophilic) aprotic solvent with a high boiling point. It facilitates reactions that follow polar mechanisms, such as SN2 reactions. Dimethylformamide can be synthesized from methyl formate anddimethylamine or by reaction of dimethylamine with carbon monoxide. Dimethyl ...
How to Use Reaction Stoichiometry
... Figure 4.6 (a) When an octane molecule undergoes complete combustion, it forms carbon dioxide and water: one CO2 molecule is formed for each carbon atom present (yellow arrows). (b) However, in a limited supply of oxygen, some of the carbon atoms end up as carbon monoxide molecules, CO, so the yiel ...
... Figure 4.6 (a) When an octane molecule undergoes complete combustion, it forms carbon dioxide and water: one CO2 molecule is formed for each carbon atom present (yellow arrows). (b) However, in a limited supply of oxygen, some of the carbon atoms end up as carbon monoxide molecules, CO, so the yiel ...
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([Cu(NH3)4](MnO4)2)
... The appearance of IR-inactive Cu N stretching modes in the IR spectrum of 1 shows the symmetry-lowering due to distortion of the regular square-planar CuN4 geometry. The splittings of nÄs , ds, and 1r N H bands or the nÄas Cu N band confirm the symmetry-lowering of the complex cation. The presence o ...
... The appearance of IR-inactive Cu N stretching modes in the IR spectrum of 1 shows the symmetry-lowering due to distortion of the regular square-planar CuN4 geometry. The splittings of nÄs , ds, and 1r N H bands or the nÄas Cu N band confirm the symmetry-lowering of the complex cation. The presence o ...
Solids Chemistry XII - The Gurukul Institute
... When would dissolving of solute in a solvent leads to liberation of heat energy? How is it that NaCl is soluble in water but not in benzene? What is the weight percent of a solution? State the unit of it in which it is expressed. ...
... When would dissolving of solute in a solvent leads to liberation of heat energy? How is it that NaCl is soluble in water but not in benzene? What is the weight percent of a solution? State the unit of it in which it is expressed. ...
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.