aciee-2004-43-5442-palomo
... between nitromethane and either aromatic or aliphatic aldehydes at 35 8C within about 24 h to produce nitroaldols 8 (R’ = H) in yields in the 56 to 90 % range and up to 93 % ee. Zinc-based catalysts are especially interesting because they might be compatible with aqueous systems in the light of the ...
... between nitromethane and either aromatic or aliphatic aldehydes at 35 8C within about 24 h to produce nitroaldols 8 (R’ = H) in yields in the 56 to 90 % range and up to 93 % ee. Zinc-based catalysts are especially interesting because they might be compatible with aqueous systems in the light of the ...
An Efficient Method for Selective Deprotection of Trimethylsilyl
... under solvent-free conditions with this reagent failed in the absence of catalyst, the effect of several Lewis acids such as ZnCl2, FeCl3, FeBr3, SnCl2, SnCl4, CuCl2, BiCl3, AlBr3, and AlCl3 were also examined under solvent-free conditions. Surprisingly, only AlCl3 was shown to be effective catalyst ...
... under solvent-free conditions with this reagent failed in the absence of catalyst, the effect of several Lewis acids such as ZnCl2, FeCl3, FeBr3, SnCl2, SnCl4, CuCl2, BiCl3, AlBr3, and AlCl3 were also examined under solvent-free conditions. Surprisingly, only AlCl3 was shown to be effective catalyst ...
16.1 The Carbonyl Group
... • Ketones are named systematically by replacing the final -e of the alkane name with -one. The numbering of the chain begins at the end nearest the carbonyl group. The location of the carbonyl group is indicated by placing the number of the carbonyl carbon in front of the name. Using this nomenclatu ...
... • Ketones are named systematically by replacing the final -e of the alkane name with -one. The numbering of the chain begins at the end nearest the carbonyl group. The location of the carbonyl group is indicated by placing the number of the carbonyl carbon in front of the name. Using this nomenclatu ...
Aldehydes and ketones
... – Select as the parent chain the longest continuous chain that involves the carbon of the carbonyl group – Name the parent chain by removing the “e” from the corresponding alkane name and adding “one” – Number the chain to give the carbonyl group the lowest numbering. The number goes before the pare ...
... – Select as the parent chain the longest continuous chain that involves the carbon of the carbonyl group – Name the parent chain by removing the “e” from the corresponding alkane name and adding “one” – Number the chain to give the carbonyl group the lowest numbering. The number goes before the pare ...
Chemistry - Kendriya Vidyalaya Raigarh
... during the formation of a chemical bond called its covalency in that compound. SINGLE COVALENT BOND: A covalent bond formed by the mutual sharing of one pair of electrons is called a single covalent bond, or simply a single bond. A single covalent bond is represented by a small line (−) between the ...
... during the formation of a chemical bond called its covalency in that compound. SINGLE COVALENT BOND: A covalent bond formed by the mutual sharing of one pair of electrons is called a single covalent bond, or simply a single bond. A single covalent bond is represented by a small line (−) between the ...
Organic Chemistry - Madison Public Schools
... • Carbon can also form ringed structures. • Five- and six-membered rings are most stable. Can take on conformation in which angles are very close to tetrahedral angle. Smaller rings are quite strained. ...
... • Carbon can also form ringed structures. • Five- and six-membered rings are most stable. Can take on conformation in which angles are very close to tetrahedral angle. Smaller rings are quite strained. ...
A GRIGNARD REACTION: SYNTHESIS OF 2-METHYL-2
... once connected to Mg (which is less electronegative than C). This change is sometimes called “Umpolung” – German for “change in polarity”. 2. The Grignard reagent is mixed with a compound that has an electron-deficient carbonyl carbon. In this case, acetone is used. The electron-rich C attacks the e ...
... once connected to Mg (which is less electronegative than C). This change is sometimes called “Umpolung” – German for “change in polarity”. 2. The Grignard reagent is mixed with a compound that has an electron-deficient carbonyl carbon. In this case, acetone is used. The electron-rich C attacks the e ...
C - Deans Community High School
... a hint!!!! This is a primary alcohol because the OH group is attached to a carbon which is bonded to only one other carbon. H ...
... a hint!!!! This is a primary alcohol because the OH group is attached to a carbon which is bonded to only one other carbon. H ...
Chapter 24. Amines
... is chiral (in principle but not in practice): the lone pair of electrons is the fourth substituent Most amines that have 3 different substituents on N are not resolved because the molecules interconvert by pyramidal inversion ...
... is chiral (in principle but not in practice): the lone pair of electrons is the fourth substituent Most amines that have 3 different substituents on N are not resolved because the molecules interconvert by pyramidal inversion ...
O R` R
... (an excellent nucleophile and weak base) with 1º and 2 º alkyl halides via an SN2 mechanism. • A strong base (usually an alkyllithium or phenyllithium) is required to remove a proton from the intermediate alkyltriphenylphosphonium salt. (C 6H5)3P ...
... (an excellent nucleophile and weak base) with 1º and 2 º alkyl halides via an SN2 mechanism. • A strong base (usually an alkyllithium or phenyllithium) is required to remove a proton from the intermediate alkyltriphenylphosphonium salt. (C 6H5)3P ...
Chapter 24. Amines - Houston Community College System
... is chiral (in principle but not in practice): the lone pair of electrons is the fourth substituent Most amines that have 3 different substituents on N are not resolved because the molecules interconvert by pyramidal inversion ...
... is chiral (in principle but not in practice): the lone pair of electrons is the fourth substituent Most amines that have 3 different substituents on N are not resolved because the molecules interconvert by pyramidal inversion ...
IGCSE SoW 2013
... Describe the reactions with oxygen in air of magnesium, carbon and sulphur, and the acidbase character of the oxides produced and link acid - base character of the oxides to the position of the element in the Periodic Table ...
... Describe the reactions with oxygen in air of magnesium, carbon and sulphur, and the acidbase character of the oxides produced and link acid - base character of the oxides to the position of the element in the Periodic Table ...
Chapter 14 Notes
... • Using the root alkane name, drop the –e ending and change to –one. • Number the longest carbon chain so the C=O group has the lowest number. • Name and number other substituents as before. Examples: ...
... • Using the root alkane name, drop the –e ending and change to –one. • Number the longest carbon chain so the C=O group has the lowest number. • Name and number other substituents as before. Examples: ...
friedel-craft reaction: a review - Advance Institute of Biotech
... MAOs, having the general formula [–Al(Me)– O–]n and high molecular weights, abstract the alkyl or halogeno ligand of the transition metal (Ti, Zn, etc.) catalysts and form cationic alkyl complexes, which are regarded as the active species of the alkene polymerization. The bulky anion, formed from th ...
... MAOs, having the general formula [–Al(Me)– O–]n and high molecular weights, abstract the alkyl or halogeno ligand of the transition metal (Ti, Zn, etc.) catalysts and form cationic alkyl complexes, which are regarded as the active species of the alkene polymerization. The bulky anion, formed from th ...
Fragmentations Associated with Organic Functional Groups
... There follows some additional discussion on fragmentations of selected functional groups, in order to expand upon some of the features in the above table, but also to introduce fragmentations that occur by rearrangement – that is, fragmentations involving several synchronous bond fissions. ...
... There follows some additional discussion on fragmentations of selected functional groups, in order to expand upon some of the features in the above table, but also to introduce fragmentations that occur by rearrangement – that is, fragmentations involving several synchronous bond fissions. ...
16565 Demonstrate knowledge of organic compounds
... Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment. Industry Training Organisations must be granted consent to assess against standards by NZQ ...
... Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment. Industry Training Organisations must be granted consent to assess against standards by NZQ ...
Lab 9
... Esters are acid derivatives and contain a carbonyl group; whereas, ethers are water or alcohol derivatives and do not contain a carbonyl group. Alcohols are named by finding the longest carbon chain to which the OH group is bonded and naming the alcohol accordingly. Ethers have two R groups, which m ...
... Esters are acid derivatives and contain a carbonyl group; whereas, ethers are water or alcohol derivatives and do not contain a carbonyl group. Alcohols are named by finding the longest carbon chain to which the OH group is bonded and naming the alcohol accordingly. Ethers have two R groups, which m ...
Level 3: Organics Part I
... nucleophile is any species that loves nuclei – or is attracted to a positive charge. Nucleophiles are species carrying a lone pair of electrons or a negative charge: eg: H2O, OH- or NH3 The C-X bond is polar is haloalkanes and has a slightly positive charge. The positive carbon is vulnerable to atta ...
... nucleophile is any species that loves nuclei – or is attracted to a positive charge. Nucleophiles are species carrying a lone pair of electrons or a negative charge: eg: H2O, OH- or NH3 The C-X bond is polar is haloalkanes and has a slightly positive charge. The positive carbon is vulnerable to atta ...
Organic Chemistry Boardwork
... The further substituted chloroalkanes are impurities that must be removed. The amount of these molecules can be decreased by reducing the proportion of chlorine in the reaction mixture. 45 of 31 ...
... The further substituted chloroalkanes are impurities that must be removed. The amount of these molecules can be decreased by reducing the proportion of chlorine in the reaction mixture. 45 of 31 ...
Ordinary Level - State Examination Commission
... Which type of nuclear decay emits negatively-charged particles? Give one way to deflect charged nuclear radiations. ...
... Which type of nuclear decay emits negatively-charged particles? Give one way to deflect charged nuclear radiations. ...
2B Synthesis Organic synthesis of aliphatic and aromatic
... The chiral carbons often have an asterisk on to show the chiral centre. Compounds that do not have 4 different groups around a carbon atom are said to be achiral. (most compounds are these). The 2 isomers are called enantiomers. You must draw them in 3D and a mirror line is often drawn to help with ...
... The chiral carbons often have an asterisk on to show the chiral centre. Compounds that do not have 4 different groups around a carbon atom are said to be achiral. (most compounds are these). The 2 isomers are called enantiomers. You must draw them in 3D and a mirror line is often drawn to help with ...
Alkene
In organic chemistry, an alkene is an unsaturated hydrocarbon that contains at least one carbon–carbon double bond. Alkene, olefin, and olefine are used often interchangeably (see nomenclature section below). Acyclic alkenes, with only one double bond and no other functional groups, known as mono-enes, form a homologous series of hydrocarbons with the general formula CnH2n. Alkenes have two hydrogen atoms less than the corresponding alkane (with the same number of carbon atoms). The simplest alkene, ethylene (C2H4), which has the International Union of Pure and Applied Chemistry (IUPAC) name ethene is the organic compound produced on the largest scale industrially. Aromatic compounds are often drawn as cyclic alkenes, but their structure and properties are different and they are not considered to be alkenes.