Urea-formaldehyde (UF) resins have been one of the mainstays of
... acid with one or more of an α,β unsaturated carboxylic acid or anhydride, e.g., maleic anhydride. The α,β unsaturated carboxylic acid or anhydride can be a biogenically derived α,β unsaturated carboxylic acid or anhydride. Non-limiting examples of biogenically derived α,β unsaturated carboxylic acid ...
... acid with one or more of an α,β unsaturated carboxylic acid or anhydride, e.g., maleic anhydride. The α,β unsaturated carboxylic acid or anhydride can be a biogenically derived α,β unsaturated carboxylic acid or anhydride. Non-limiting examples of biogenically derived α,β unsaturated carboxylic acid ...
presentation source
... Check for functional groups and reagents, then for inorganics added. In (a) the -OH will substitute in the alkyl halide; in (b) the amine and alkyl halide will undergo a substitution of amine for halogen; in (c) the inorganics form a strong oxidizing agent resulting in an elimination. ...
... Check for functional groups and reagents, then for inorganics added. In (a) the -OH will substitute in the alkyl halide; in (b) the amine and alkyl halide will undergo a substitution of amine for halogen; in (c) the inorganics form a strong oxidizing agent resulting in an elimination. ...
Surface and interface control of noble metal nanocrystals for
... have to find paths to interact with the catalytic surface of the NM nanocrystals. NM nanocrystals applied in catalysis can be broadly classified into four categories: (1) supportless NM nanocrystals with clean surfaces; (2) supportless NM nanocrystals that are surface-capped by organic species; (3) su ...
... have to find paths to interact with the catalytic surface of the NM nanocrystals. NM nanocrystals applied in catalysis can be broadly classified into four categories: (1) supportless NM nanocrystals with clean surfaces; (2) supportless NM nanocrystals that are surface-capped by organic species; (3) su ...
One-pot aqueous synthesis of cysteine-capped
... In recent years, colloidal CdTe nanowires have been prepared by various wet-chemical methods (Protasenko et al. 2006; Grebinksi et al. 2004; Grebinski et al. 2004; Kuno et al. 2006). These methods generally require the use of organic solvents, high temperature or pressure, oxygen and water-free cond ...
... In recent years, colloidal CdTe nanowires have been prepared by various wet-chemical methods (Protasenko et al. 2006; Grebinksi et al. 2004; Grebinski et al. 2004; Kuno et al. 2006). These methods generally require the use of organic solvents, high temperature or pressure, oxygen and water-free cond ...
IChO 2011
... of colemanite with sulfuric acid. The reaction is carried out at temperatures above 80 °C. Calcium sulfate dihydrate (gypsum, CaSO4·2 H2O) crystallizes from the reaction solution and the crystals are filtered out from the hot solution. Subsequently, boric acid crystallizes from the solution when it ...
... of colemanite with sulfuric acid. The reaction is carried out at temperatures above 80 °C. Calcium sulfate dihydrate (gypsum, CaSO4·2 H2O) crystallizes from the reaction solution and the crystals are filtered out from the hot solution. Subsequently, boric acid crystallizes from the solution when it ...
LINALOOL BIOTRANSFORMATION WITH FUNGI
... agar (MEA) and biotransformation experiments were performed in malt yeast broth (MYB). (±)-Linalool (> 97 % (v/v)), (−)-linalool (> 98.5 % (v/v)), 1-octanol (> 99.5 % (v/v)), cis- and trans-furanoid linalool oxide (> 97 % (v/v), mixture of isomers) and tert-butyl methyl ether (MTBE) (> 99.8 % (v/v)) ...
... agar (MEA) and biotransformation experiments were performed in malt yeast broth (MYB). (±)-Linalool (> 97 % (v/v)), (−)-linalool (> 98.5 % (v/v)), 1-octanol (> 99.5 % (v/v)), cis- and trans-furanoid linalool oxide (> 97 % (v/v), mixture of isomers) and tert-butyl methyl ether (MTBE) (> 99.8 % (v/v)) ...
Alkenes 4 - ChemWeb (UCC)
... Note that in these rearrangements the migrating atom (H) or group (R) carries a bonding electron-pair along with it when it moves, i.e. the migrating species is to be regarded as either a hydride anion (H-) or as a carbanion (R-). ...
... Note that in these rearrangements the migrating atom (H) or group (R) carries a bonding electron-pair along with it when it moves, i.e. the migrating species is to be regarded as either a hydride anion (H-) or as a carbanion (R-). ...
chapter2
... (isooctane) in a mixture of isooctane and heptane that has equivalent antiknock properties ...
... (isooctane) in a mixture of isooctane and heptane that has equivalent antiknock properties ...
Chapter 12 EDTA Titrations Coordination Number Geometries Ligands
... There are two common geometries for metals with a coordination number of four: Tetrahedral & Square planar ...
... There are two common geometries for metals with a coordination number of four: Tetrahedral & Square planar ...
CHAPTER 12 | The Chemistry of Solids
... Band theory is a model of bonding in which orbitals on many atoms are combined, as in molecular orbital theory, to form a fully or partially filled valence band and an empty conduction band. Solve Yes, by combining the 1s orbitals on many hydrogen atoms at very low temperatures and at high pressures ...
... Band theory is a model of bonding in which orbitals on many atoms are combined, as in molecular orbital theory, to form a fully or partially filled valence band and an empty conduction band. Solve Yes, by combining the 1s orbitals on many hydrogen atoms at very low temperatures and at high pressures ...
IUPAC Provisional Recommendations
... Compounds, its separation from Coordination Compounds (Chapter IR-9) reflecting the huge growth in importance of organometallic chemistry and the very different problems associated with the presence of π-bonded ligands. Chapter IR-9 has also undergone considerable revision (cf. the old Chapter I-10) ...
... Compounds, its separation from Coordination Compounds (Chapter IR-9) reflecting the huge growth in importance of organometallic chemistry and the very different problems associated with the presence of π-bonded ligands. Chapter IR-9 has also undergone considerable revision (cf. the old Chapter I-10) ...
Atypical compounds of gases, which have been called `noble`{
... reduced in a (formally) 2e2 process, while two nonmetal–based ligands L2 are oxidized in two 1e2 processes, and then they form the L–L bond. Thus stability of nonmetal–Xe bonds is essentially governed by the electron transfer reactions, just as in the case of hydrides,37 oxides, and many other famil ...
... reduced in a (formally) 2e2 process, while two nonmetal–based ligands L2 are oxidized in two 1e2 processes, and then they form the L–L bond. Thus stability of nonmetal–Xe bonds is essentially governed by the electron transfer reactions, just as in the case of hydrides,37 oxides, and many other famil ...
barker_rg
... distillation to remove the acetic acid formed and excess acetic anhydride (12). This trianhydride could be an important esterification intermediate as it can be reacted with alcohols with the accompanying formation of less water than that obtained when TMA is esterified. ...
... distillation to remove the acetic acid formed and excess acetic anhydride (12). This trianhydride could be an important esterification intermediate as it can be reacted with alcohols with the accompanying formation of less water than that obtained when TMA is esterified. ...
New Calcium Indicators and Buffers with High Selectivity against
... H). This tetraester was saponified as above with aqueous ethanolic KOH to give the tetrapotassium salt of compound 3a. Synthesis of Ligand 3b. 2-Methyl-6-methoxy-8-nitroquinoline [1.38 g (6.38 mmol)] (Mathur & Robinson, 1934), 0.244 g (2.98 mmol) of anhydrous sodium acetate, 0.270 g (1.36 mmol) of s ...
... H). This tetraester was saponified as above with aqueous ethanolic KOH to give the tetrapotassium salt of compound 3a. Synthesis of Ligand 3b. 2-Methyl-6-methoxy-8-nitroquinoline [1.38 g (6.38 mmol)] (Mathur & Robinson, 1934), 0.244 g (2.98 mmol) of anhydrous sodium acetate, 0.270 g (1.36 mmol) of s ...
Part I Carbohydrate Auxiliaries - Wiley-VCH
... of α,β-diamino acids involving enantiomerically pure α-amino aldehydes, Opivaloylated glucopyranosylamine, and TMSCN was developed. The α-aminoaldehydes 14 reacted with glucopyranosylamine 13 in CH2Cl2 to give the corresponding imines 15a and 15b in high yields. The nucleophilic addition of TMSCN to ...
... of α,β-diamino acids involving enantiomerically pure α-amino aldehydes, Opivaloylated glucopyranosylamine, and TMSCN was developed. The α-aminoaldehydes 14 reacted with glucopyranosylamine 13 in CH2Cl2 to give the corresponding imines 15a and 15b in high yields. The nucleophilic addition of TMSCN to ...
Metal Ion-Promoted Leaving Group Assistance in the Solvolysis of
... With minor formatting changes, Chapter 3 is presented largely as it is published in Inorganic Chemistry (Raycroft, M. A. R.; Maxwell, C. I.; Oldham, R. A. A.; Saffouri Andrea, A.; Neverov, A. A.; Brown, R. S. Inorg. Chem. 2012, 51, 10325). The corresponding Supporting Information is represented in p ...
... With minor formatting changes, Chapter 3 is presented largely as it is published in Inorganic Chemistry (Raycroft, M. A. R.; Maxwell, C. I.; Oldham, R. A. A.; Saffouri Andrea, A.; Neverov, A. A.; Brown, R. S. Inorg. Chem. 2012, 51, 10325). The corresponding Supporting Information is represented in p ...
Preparation and reactions of some lower tungsten halides and
... Tungsten(IV) bromide has been prepared by McCarley and Brown (26). The method used by these workers involved the reduction of tungsten(V) bromide with tungsten metal in a ...
... Tungsten(IV) bromide has been prepared by McCarley and Brown (26). The method used by these workers involved the reduction of tungsten(V) bromide with tungsten metal in a ...
Elimination Reactions
... • E1 reactions occur under essentially neutral conditions with polar solvents, such as water, ethyl alcohol or acetic acid. • E1 reactions can also occur with strong bases, but only at low concentration, about 0.01 to 0.1 M or below. • E2 reactions require strong base in high concentration, about 1 ...
... • E1 reactions occur under essentially neutral conditions with polar solvents, such as water, ethyl alcohol or acetic acid. • E1 reactions can also occur with strong bases, but only at low concentration, about 0.01 to 0.1 M or below. • E2 reactions require strong base in high concentration, about 1 ...
an introduction to organic reactions
... 1. Keep up with your studying day to day –– never let yourself get behind, or better yet, be a little ahead of your instructor. ...
... 1. Keep up with your studying day to day –– never let yourself get behind, or better yet, be a little ahead of your instructor. ...
doc
... formula C6H6 and consists of a ring of six carbon atoms. Based on the chemical formula, one proposed structure for benzene was the following: CH HC ...
... formula C6H6 and consists of a ring of six carbon atoms. Based on the chemical formula, one proposed structure for benzene was the following: CH HC ...
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.