SYNOPSIS
... The acid-catalyzed reaction of electron-rich heterocyclic compounds with pdimethylamino benzaldehyde is known as Ehrlich test for -electron excessive heterocycles such as pyroles and indoles. The analogous reaction of indoles with other aromatic or aliphatic aldehyde and ketones produces azafulveni ...
... The acid-catalyzed reaction of electron-rich heterocyclic compounds with pdimethylamino benzaldehyde is known as Ehrlich test for -electron excessive heterocycles such as pyroles and indoles. The analogous reaction of indoles with other aromatic or aliphatic aldehyde and ketones produces azafulveni ...
Organic Chemistry II / CHEM 252 Chapter 16
... • Dissolving aldehydes (or ketones) in water causes formation of an equilibrium between the carbonyl compound and its hydrate – The hydrate is also called a gem-diol (gem i.e. geminal, indicates the presence of two identical substituents on the same carbon) – The equilibrum favors a ketone over its ...
... • Dissolving aldehydes (or ketones) in water causes formation of an equilibrium between the carbonyl compound and its hydrate – The hydrate is also called a gem-diol (gem i.e. geminal, indicates the presence of two identical substituents on the same carbon) – The equilibrum favors a ketone over its ...
Chapter 16 Alkanes and alkenes
... alkenes alkenes a group of hydrocarbons with the general formula, CnH2n where n is the number of carbon atoms in one molecule contain the C=C functional group (unsaturated hydrocarbons) names of alkenes end with -ene are molecular compounds have low boiling points; gases under room conditi ...
... alkenes alkenes a group of hydrocarbons with the general formula, CnH2n where n is the number of carbon atoms in one molecule contain the C=C functional group (unsaturated hydrocarbons) names of alkenes end with -ene are molecular compounds have low boiling points; gases under room conditi ...
Structural determination of organic compounds
... Qualitative Analysis of Elements in an Organic Compound Determination of Empirical Formula and Molecular Formula from Analytical Data Structural Information from Physical Properties Structural Information from Chemical Properties Use of Infra-red Spectrocopy in the Identification of ...
... Qualitative Analysis of Elements in an Organic Compound Determination of Empirical Formula and Molecular Formula from Analytical Data Structural Information from Physical Properties Structural Information from Chemical Properties Use of Infra-red Spectrocopy in the Identification of ...
Organic Chemistry
... Hydrocarbons are compounds that contain only carbon and hydrogen. These particular hydrocarbons are also classified as alkanes. Alkanes are hydrocarbons that contain only single covalent bonds. Since the carbons in these molecules bond to the maximum number of hydrogens, alkanes are known as saturat ...
... Hydrocarbons are compounds that contain only carbon and hydrogen. These particular hydrocarbons are also classified as alkanes. Alkanes are hydrocarbons that contain only single covalent bonds. Since the carbons in these molecules bond to the maximum number of hydrogens, alkanes are known as saturat ...
pyrene on Au(111) - American Chemical Society
... Figure 1. (A) UPS He I spectra of naphtho[2,3-a]pyrene deposited on Au(111). The right portion shows the full spectra on a binding energy scale. The high binding energy cutoff is shown on the left. The molecular structure of NP is shown in the upper right of the figure. (B) A plot of the interface w ...
... Figure 1. (A) UPS He I spectra of naphtho[2,3-a]pyrene deposited on Au(111). The right portion shows the full spectra on a binding energy scale. The high binding energy cutoff is shown on the left. The molecular structure of NP is shown in the upper right of the figure. (B) A plot of the interface w ...
E Reprint 212 - Trade Science Inc
... ABSTRACT Barium dichromate is used as an efficient oxidizing agent for the conversion of different types of thiols to their corresponding disulfides. Overoxidation does not occur and both aromatic and aliphatic thiols undergo oxidation in the same manner. 2006 Trade Science Inc. -INDIA ...
... ABSTRACT Barium dichromate is used as an efficient oxidizing agent for the conversion of different types of thiols to their corresponding disulfides. Overoxidation does not occur and both aromatic and aliphatic thiols undergo oxidation in the same manner. 2006 Trade Science Inc. -INDIA ...
Boron is produced by cosmic ray spallation, is a metalloid, and is
... ultratrace element in animals. Deficiency of boron in rats has been shown to result in poor coat or hair quality. ...
... ultratrace element in animals. Deficiency of boron in rats has been shown to result in poor coat or hair quality. ...
1 Chemical Bonding and Molecular Structure
... central oxygen in water resulting in sp3 hybridisation. According to Sidgwick-Powell rule there is maximum repulsion force between these two non bonding electron pairs and as a result they remain away from each other. When it happens so, they go near the bonding electron pairs due to repulsion is ...
... central oxygen in water resulting in sp3 hybridisation. According to Sidgwick-Powell rule there is maximum repulsion force between these two non bonding electron pairs and as a result they remain away from each other. When it happens so, they go near the bonding electron pairs due to repulsion is ...
Reversible binding of sulfur dioxide to arylplatinum (II) and nickel (II
... one of the complexes was crystallographically studied. IR and Raman Spectra. IR spectra of 2a-f (in KBr pellets or in Nujol mulls between NaCl windows) show two strong absorption bands in the region 1231-1245 and 1053-1078 cm-l, respectively, which can be assigned to the asymmetric and symmetric S-0 ...
... one of the complexes was crystallographically studied. IR and Raman Spectra. IR spectra of 2a-f (in KBr pellets or in Nujol mulls between NaCl windows) show two strong absorption bands in the region 1231-1245 and 1053-1078 cm-l, respectively, which can be assigned to the asymmetric and symmetric S-0 ...
Molecular Orbital
... antibonding molecular orbital. The same thing happens when the 2py orbitals interact, only in this case we get a y and a y* antibonding molecular orbital. Because there is no difference between the energies of the 2px and 2py atomic orbitals, there is no difference between the energies of the x and ...
... antibonding molecular orbital. The same thing happens when the 2py orbitals interact, only in this case we get a y and a y* antibonding molecular orbital. Because there is no difference between the energies of the 2px and 2py atomic orbitals, there is no difference between the energies of the x and ...
ppt
... The drug, THALIDOMIDE is a chiral molecule and can exist as two enantiomers. In the 1960’s it was used to treat anxiety and morning sickness in pregnant women. Tragically, many gave birth to children with deformities and missing limbs. It turned out that only one of the enantiomers (the structure on ...
... The drug, THALIDOMIDE is a chiral molecule and can exist as two enantiomers. In the 1960’s it was used to treat anxiety and morning sickness in pregnant women. Tragically, many gave birth to children with deformities and missing limbs. It turned out that only one of the enantiomers (the structure on ...
Organic Chemistry
... Organic chemistry is the branch of chemistry that deals with the study of carbon based compounds. Bonds between carbon atoms are covalent; each carbon is capable of forming four bonds: – Four single bonds = tertrahedral geometry – Two single, one double = trigonal planar geometry – Two double = line ...
... Organic chemistry is the branch of chemistry that deals with the study of carbon based compounds. Bonds between carbon atoms are covalent; each carbon is capable of forming four bonds: – Four single bonds = tertrahedral geometry – Two single, one double = trigonal planar geometry – Two double = line ...
10 | Carbon: More Than Just Another Element
... group gives ethane. If an H atom of ethane is replaced by yet another OCH3 group, propane results. Butane is derived from propane by replacing an H atom of one of the chain-ending carbon atoms with a OCH3 group. In all of these compounds, each C atom is attached to four other atoms, either C or H, s ...
... group gives ethane. If an H atom of ethane is replaced by yet another OCH3 group, propane results. Butane is derived from propane by replacing an H atom of one of the chain-ending carbon atoms with a OCH3 group. In all of these compounds, each C atom is attached to four other atoms, either C or H, s ...
Selective Oxidation Reactions of Natural Compounds with
... The active species involved in the oxygen transfer to the olefinic double bond are probably a monoperoxo complex [MeRe(O)2(O2)] and a diperoxo complex [MeRe(O)(O2)2], obtained respectively by the addition of one or two H2O2 molecules to MTO [23]. However, depending on the nature of the epoxide, a ri ...
... The active species involved in the oxygen transfer to the olefinic double bond are probably a monoperoxo complex [MeRe(O)2(O2)] and a diperoxo complex [MeRe(O)(O2)2], obtained respectively by the addition of one or two H2O2 molecules to MTO [23]. However, depending on the nature of the epoxide, a ri ...
Ch 16 Amines - Tennessee Wesleyan College
... Nitrogen is taken as the parent amine • The smaller groups are named as substituents and their locations are indicated with an N- ...
... Nitrogen is taken as the parent amine • The smaller groups are named as substituents and their locations are indicated with an N- ...
Chapter 11: Alcohols, Phenols And Ethers
... 9. Acidic nature: a. Phenol > H2O > Primary alcohol > Secondary alcohol > Tertiary alcohol The acidic character of alcohols is due to the polar nature of O–H bond. Alkyl group is an electron-releasing group (–CH3, –C2H5) or it has electron releasing inductive effect (+I effect).Due to +I effect of a ...
... 9. Acidic nature: a. Phenol > H2O > Primary alcohol > Secondary alcohol > Tertiary alcohol The acidic character of alcohols is due to the polar nature of O–H bond. Alkyl group is an electron-releasing group (–CH3, –C2H5) or it has electron releasing inductive effect (+I effect).Due to +I effect of a ...
Chapter 20 - Cengage Learning
... Hydrocarbons are compounds composed entirely of carbon and hydrogen. Hydrocarbons are either saturated or unsaturated. A saturated hydrocarbon is one in which all the carbons are bonded to four atoms. An unsaturated hydrocarbon has at least one carbon atom bonded to less than four atoms, that is, it ...
... Hydrocarbons are compounds composed entirely of carbon and hydrogen. Hydrocarbons are either saturated or unsaturated. A saturated hydrocarbon is one in which all the carbons are bonded to four atoms. An unsaturated hydrocarbon has at least one carbon atom bonded to less than four atoms, that is, it ...
Quantum chemical methods for high-energy
... Crystal densities were approximated by two quantum chemical analogues of the empirical volume additivity procedure, as suggested in the work of Rice et al. [1] and Politzer et al. [2]. In particular, estimates were obtained by calculating the molecular volume as that enclosed by a 0.001 electrons/bo ...
... Crystal densities were approximated by two quantum chemical analogues of the empirical volume additivity procedure, as suggested in the work of Rice et al. [1] and Politzer et al. [2]. In particular, estimates were obtained by calculating the molecular volume as that enclosed by a 0.001 electrons/bo ...
chapter_10au use in class
... Valence Shell Electron Pair Repulsion VSEPR Theory • Electron Pairs in the Valence Shell of the central atom Repel each other whether they are in chemical bonds (bond pairs) or unshared (lone pairs). • Electron pairs assume orientations about an atom to ...
... Valence Shell Electron Pair Repulsion VSEPR Theory • Electron Pairs in the Valence Shell of the central atom Repel each other whether they are in chemical bonds (bond pairs) or unshared (lone pairs). • Electron pairs assume orientations about an atom to ...
ENGLISH VERSION Exam Organic Chemistry 2
... place on Wednesday June 4, 2007, at 10.00-12.00 in the Erdtman-room, Organic Chemistry, Teknikringen 30, Level 7. No special registration necessary. Please note that the minimum requirement for the course have to be demonstrated in this case also. The make-up exam will take place on Thursday August ...
... place on Wednesday June 4, 2007, at 10.00-12.00 in the Erdtman-room, Organic Chemistry, Teknikringen 30, Level 7. No special registration necessary. Please note that the minimum requirement for the course have to be demonstrated in this case also. The make-up exam will take place on Thursday August ...
Microsoft Word - Ethesis@nitr
... RESULT AND DISCUSSION The most important methods for preparing this class of heterocycles are the reaction between hydrazines with β-difunctional compounds25 and 1, 3-dipolar cycloadditions of diazo compounds onto triple bonds26. The former process, considered to be the best method for the preparat ...
... RESULT AND DISCUSSION The most important methods for preparing this class of heterocycles are the reaction between hydrazines with β-difunctional compounds25 and 1, 3-dipolar cycloadditions of diazo compounds onto triple bonds26. The former process, considered to be the best method for the preparat ...
Document
... • Oxygen: normally forms two covalent bonds and has two unshared pairs of electrons. • Halogen: normally forms one covalent bond and has three unshared pairs of electrons. © 2006 Thomson Learning, Inc. All rights reserved ...
... • Oxygen: normally forms two covalent bonds and has two unshared pairs of electrons. • Halogen: normally forms one covalent bond and has three unshared pairs of electrons. © 2006 Thomson Learning, Inc. All rights reserved ...
Lft} (rr
... hydrogen uio*, variation treatment for the ground state of helium atom; Perturbation method - time-independent perturbation method (non-degenerate case only), illustration by application to particle in a ID-box with slanted. bottom, perturbation treatment of the ground state of the helium atom. UNIT ...
... hydrogen uio*, variation treatment for the ground state of helium atom; Perturbation method - time-independent perturbation method (non-degenerate case only), illustration by application to particle in a ID-box with slanted. bottom, perturbation treatment of the ground state of the helium atom. UNIT ...
Homoaromaticity
Homoaromaticity in organic chemistry refers to a special case of aromaticity in which conjugation is interrupted by a single sp3 hybridized carbon atom. Although this sp3 center disrupts the continuous overlap of p-orbitals, traditionally thought to be a requirement for aromaticity, considerable thermodynamic stability and many of the spectroscopic, magnetic, and chemical properties associated with aromatic compounds are still observed for such compounds. This formal discontinuity is apparently bridged by p-orbital overlap, maintaining a contiguous cycle of π electrons that is responsible for this preserved chemical stability.The concept of homoaromaticity was pioneered by Saul Winstein in 1959, prompted by his studies of the “tris-homocyclopropenyl” cation. Since the publication of Winstein's paper, much research has been devoted to understanding and classifying these molecules, which represent an additional “class” of aromatic molecules included under the continuously broadening definition of aromaticity. To date, homoaromatic compounds are known to exist as cationic and anionic species, and some studies support the existence of neutral homoaromatic molecules, though these are less common. The 'homotropylium' cation (C8H9+) is perhaps the best studied example of a homoaromatic compound.