Representative Elements Part 1
... The reaction is endothermic, but has a positive entropy change. The reaction becomes spontaneous and goes to completion when carried out at high temperature (>900 oC). More hydrogen can be obtained if the CO gas is piped into another reactor where it is further reacted with steam in a reaction known ...
... The reaction is endothermic, but has a positive entropy change. The reaction becomes spontaneous and goes to completion when carried out at high temperature (>900 oC). More hydrogen can be obtained if the CO gas is piped into another reactor where it is further reacted with steam in a reaction known ...
New synthetic methodologies based on active transition metals*
... In the last five years, there has been increasing interest in the transition-metal-catalyzed α-alkylation of ketones with primary alcohols, as an alternative strategy to the standard α-alkylation of ketone enolates with alkyl halides, which can improve the regioselectivity of the process at the time ...
... In the last five years, there has been increasing interest in the transition-metal-catalyzed α-alkylation of ketones with primary alcohols, as an alternative strategy to the standard α-alkylation of ketone enolates with alkyl halides, which can improve the regioselectivity of the process at the time ...
Coordination Chemistry Reviews 272 - Didier Astruc`s Library
... position. Subsequently, imidazole-based carbenes with the metal bonded at the C4(5) position were also first reported by Crabtree and co-workers (Fig. 2) [11]. These carbenes are called “abnormal” N-heterocyclic carbenes (aNHCs), and they are even stronger donors than C2-bound “normal” N-heterocycl ...
... position. Subsequently, imidazole-based carbenes with the metal bonded at the C4(5) position were also first reported by Crabtree and co-workers (Fig. 2) [11]. These carbenes are called “abnormal” N-heterocyclic carbenes (aNHCs), and they are even stronger donors than C2-bound “normal” N-heterocycl ...
Preparation and structural comparison of the ruthenium (0
... resonances for free PMe, are observed to grow in rapidly (6 0.78, d, J = 2.4 Hz) as resonances for 1 disappear. A new broad singlet appears at 6 1.31 1. These changes can be interpreted in terms of the formation of the pale yellow carbonyl complex Ru(DMPE),(CO) (2) as PMe, is lost (eq 3). The latter ...
... resonances for free PMe, are observed to grow in rapidly (6 0.78, d, J = 2.4 Hz) as resonances for 1 disappear. A new broad singlet appears at 6 1.31 1. These changes can be interpreted in terms of the formation of the pale yellow carbonyl complex Ru(DMPE),(CO) (2) as PMe, is lost (eq 3). The latter ...
11.2 Types of Chemical Reactions
... These equations describe two examples of single-replacement reactions. A single-replacement reaction is a chemical change in which one element replaces a second element in a compound. You can identify a singlereplacement reaction by noting that both the reactants and the products consist of an eleme ...
... These equations describe two examples of single-replacement reactions. A single-replacement reaction is a chemical change in which one element replaces a second element in a compound. You can identify a singlereplacement reaction by noting that both the reactants and the products consist of an eleme ...
Laboratory 22: Properties of Alcohols Introduction Discussion
... A specific test for oxidizing alcohols is the Chromic Acid test. A color change from orange to green or to blue-green within 5 seconds is a positive test, indicating the alcohol has been oxidized. Another useful chemical property of alcohols is their reaction with a solution of hydrochloric acid in ...
... A specific test for oxidizing alcohols is the Chromic Acid test. A color change from orange to green or to blue-green within 5 seconds is a positive test, indicating the alcohol has been oxidized. Another useful chemical property of alcohols is their reaction with a solution of hydrochloric acid in ...
Alkenes notes
... Symmetrical alkenes only give one product when elecrophiles are added. Unsymmetrical alkenes only give one product if the electrophile is symmetrical (Eg propene Br2). Thus two products are only obtained when both the alkene and the electrophile are unsymmetrical. In such cases the identity of the m ...
... Symmetrical alkenes only give one product when elecrophiles are added. Unsymmetrical alkenes only give one product if the electrophile is symmetrical (Eg propene Br2). Thus two products are only obtained when both the alkene and the electrophile are unsymmetrical. In such cases the identity of the m ...
NUCLEOPHILIC SUBSTITUTION & ELIMINATION ON Csp 3
... SN1 alert – Carbocation Rearrangement: Frank C. Whitmore (UPenn, 1887-1947): ... carbocation rearrangements result when ... "an atom in an electron-hungry condition seeks its missing electron pair from the next atom in the molecule". A reaction: solvolysis of neopentyl iodide. ...
... SN1 alert – Carbocation Rearrangement: Frank C. Whitmore (UPenn, 1887-1947): ... carbocation rearrangements result when ... "an atom in an electron-hungry condition seeks its missing electron pair from the next atom in the molecule". A reaction: solvolysis of neopentyl iodide. ...
01. Inorganic chemistry and medicine. Complex compounds and
... Color changes produced by adding various reagents to an equilibrium mixture of Fe3+ (pale yellow), SCN- (colorless), and FeNCS2+ (red): (a) The original solution. (b) After adding to FeCl3 the original solution, the red color is darker because of an increase in [FeNCS2+]. (c) After adding KSCN to t ...
... Color changes produced by adding various reagents to an equilibrium mixture of Fe3+ (pale yellow), SCN- (colorless), and FeNCS2+ (red): (a) The original solution. (b) After adding to FeCl3 the original solution, the red color is darker because of an increase in [FeNCS2+]. (c) After adding KSCN to t ...
Chapter 4
... • Since butane and acetone are both organic compounds, they are soluble in the organic solvent CCl4. • Butane, which is nonpolar, is insoluble in H2O. • Acetone is soluble in H2O because it contains only three C atoms and its O atom can hydrogen bond with an H atom of H2O. ...
... • Since butane and acetone are both organic compounds, they are soluble in the organic solvent CCl4. • Butane, which is nonpolar, is insoluble in H2O. • Acetone is soluble in H2O because it contains only three C atoms and its O atom can hydrogen bond with an H atom of H2O. ...
Phase behavior of different forms of ice filled with hydrogen molecules
... between the C1 þ ice VII coexistence and the C1 phase (the left boundary of C1 in Fig. 4), as well as the triplepoint pressure P0 0 for the C1 þ C2 þ ice VII coexistence. The obtained phase diagram is shown in Fig. 4. When P < P0 (1.6 GPa), for any value of xH , the chemical potential of water in C2 ...
... between the C1 þ ice VII coexistence and the C1 phase (the left boundary of C1 in Fig. 4), as well as the triplepoint pressure P0 0 for the C1 þ C2 þ ice VII coexistence. The obtained phase diagram is shown in Fig. 4. When P < P0 (1.6 GPa), for any value of xH , the chemical potential of water in C2 ...
专 业 英 语 复 习 题 整理人：王华敏 化合物的英文命名 Nomenclature
... compounds? The answer is definitely,yes! (The same question can be asked of halogen atoms，which have ionization energies comparable to those of the inert gases．) A chlorine molecule is more stable than two separate chlorine atoms,but the bond of a chlorine atom to a hydrogen atom has even greater st ...
... compounds? The answer is definitely,yes! (The same question can be asked of halogen atoms，which have ionization energies comparable to those of the inert gases．) A chlorine molecule is more stable than two separate chlorine atoms,but the bond of a chlorine atom to a hydrogen atom has even greater st ...
3 -or - IONiC / VIPEr
... values usually indicate neutral carbon -system ligands (e.g., 6C6H6, 2-CH2=CH2, 4-butadiene, 4-cyclooctadiene). The # of electrons donated by the ligand in the even (neutral) case is usually just equal to x. ...
... values usually indicate neutral carbon -system ligands (e.g., 6C6H6, 2-CH2=CH2, 4-butadiene, 4-cyclooctadiene). The # of electrons donated by the ligand in the even (neutral) case is usually just equal to x. ...
Completed Notes for Organic Chemistry
... Each isomer has its own unique physical and chemical properties, which can differ greatly. For the two isomers of C4H10, the only way that isomer A could possibly be converted into isomer B would be if two single bonds were broken, CH3 and H were to exchange positions, and two new bonds were to form ...
... Each isomer has its own unique physical and chemical properties, which can differ greatly. For the two isomers of C4H10, the only way that isomer A could possibly be converted into isomer B would be if two single bonds were broken, CH3 and H were to exchange positions, and two new bonds were to form ...
4 Chemistry of Nonmetallic Elements
... Hydride complexes Complexes coordinated by hydride ligands are called hydride complexes. The Group 6 to 10 transition metals that do not form binary hydrides give many hydride ...
... Hydride complexes Complexes coordinated by hydride ligands are called hydride complexes. The Group 6 to 10 transition metals that do not form binary hydrides give many hydride ...
Chapter 9: Coordination Compounds
... 15. Chelate: An inorganic metal complex in which there is a close ring of atoms caused by attachment of a ligand to a metal ...
... 15. Chelate: An inorganic metal complex in which there is a close ring of atoms caused by attachment of a ligand to a metal ...
The Synthesis of Ferrocene
... Preparing Ferrocene via an alternate route; Miller et al noted: Compounds containing only carbon, hydrogen, and iron have not hitherto been described, and the direct replacement of hydrogen attached to carbon by iron would not have been expected to be feasible. It has now been found that reduced iro ...
... Preparing Ferrocene via an alternate route; Miller et al noted: Compounds containing only carbon, hydrogen, and iron have not hitherto been described, and the direct replacement of hydrogen attached to carbon by iron would not have been expected to be feasible. It has now been found that reduced iro ...
Student number: 單選題（共 55 題，每題 2 分，合
... What monomer(s) is (are) needed to produce the above polymer? a) ...
... What monomer(s) is (are) needed to produce the above polymer? a) ...
Use the following answers for questions 10
... 35. The addition of an oxidizing agent such as chlorine water to a clear solution of an unknown compound results in the appearance of a brown color. When this solution is shaken with the organic solvent, methylene dichloride, the organic solvent layer turns purple. The unknown compound probably cont ...
... 35. The addition of an oxidizing agent such as chlorine water to a clear solution of an unknown compound results in the appearance of a brown color. When this solution is shaken with the organic solvent, methylene dichloride, the organic solvent layer turns purple. The unknown compound probably cont ...
Zumdahl’s Chapter 15 - University of Texas at Dallas
... Empty or unfilled metal d-orbitals are targets for lone pair electrons in dative or coordinate-covalent bonding. ...
... Empty or unfilled metal d-orbitals are targets for lone pair electrons in dative or coordinate-covalent bonding. ...
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.