Hemilanthanidocene for the polymerization of styrene : from
... Rare earth half-sandwich complexes are known as highly versatile polymerization precatalysts or catalysts. A Cp*La[CH(SiMe3)2]2 (Cp* = C5Me5) half-lanthanocene was reported for the polymerization of various polar and non-polar monomers in a controlled fashion [1]. Cationic systems based on a (C5Me4S ...
... Rare earth half-sandwich complexes are known as highly versatile polymerization precatalysts or catalysts. A Cp*La[CH(SiMe3)2]2 (Cp* = C5Me5) half-lanthanocene was reported for the polymerization of various polar and non-polar monomers in a controlled fashion [1]. Cationic systems based on a (C5Me4S ...
Chapter 16 Redox chemistry and corrosion
... 6H2O(l) + 6CO2(g) C6H12O6(s) + 6O2(g) Which element is oxidised and which is reduced? A28. Carbon in carbon dioxide is reduced, oxygen in water is oxidised. Q29. When zinc reacts with a solution of hydrochloric acid, hydrogen gas is produced. a What has been oxidised in this reaction? b Write a ha ...
... 6H2O(l) + 6CO2(g) C6H12O6(s) + 6O2(g) Which element is oxidised and which is reduced? A28. Carbon in carbon dioxide is reduced, oxygen in water is oxidised. Q29. When zinc reacts with a solution of hydrochloric acid, hydrogen gas is produced. a What has been oxidised in this reaction? b Write a ha ...
DEPARTMENT OF CHEMISTRY Course Book for M.Sc. in Chemistry
... Theories of bonding : VBT, CFT, d-orbital splitting in octahedral, JT-distorted octahedral, square planar, square pyramidal, trigonal bipyramidal, and tetrahedral complexes; CFSE, pairing energy, low-spin and high-spin complexes and magnetic properties; LFT, and molecular orbital (MO) theory of sele ...
... Theories of bonding : VBT, CFT, d-orbital splitting in octahedral, JT-distorted octahedral, square planar, square pyramidal, trigonal bipyramidal, and tetrahedral complexes; CFSE, pairing energy, low-spin and high-spin complexes and magnetic properties; LFT, and molecular orbital (MO) theory of sele ...
1 Assignment 5 Hydrogen – The Unique Element
... Both molecular and saline hydrides are quite reactive. Group 1 and 2 hydrides react vigorously with water to produce hydrogen gas and a metal hydroxide. This means that they can be used as drying agents for solvents – the most commonly used in this regard is CaH2. p-Block molecular hydrides have dif ...
... Both molecular and saline hydrides are quite reactive. Group 1 and 2 hydrides react vigorously with water to produce hydrogen gas and a metal hydroxide. This means that they can be used as drying agents for solvents – the most commonly used in this regard is CaH2. p-Block molecular hydrides have dif ...
Cleaning Up With Atom Economy
... stoichiometric relationships. The calculations are a little tricky since there are three moles of sodium hydroxide and soap per one mole of triglyceride. You may wish to minimize the time involved by providing the molecular formulas and weights [C57H110O6, 891.45 g/mol; NaOH, 40.00 g/mol; NaC18H35O2 ...
... stoichiometric relationships. The calculations are a little tricky since there are three moles of sodium hydroxide and soap per one mole of triglyceride. You may wish to minimize the time involved by providing the molecular formulas and weights [C57H110O6, 891.45 g/mol; NaOH, 40.00 g/mol; NaC18H35O2 ...
d-Block and f-Block Elements
... Some important physical properties of d-block elements are listed in Table 23.2. Like sblock elements, d-block elements are also metals. But properties of these elements are markedly different from those of s-block elements. The interesting feature of the chemistry of transition elements is that sim ...
... Some important physical properties of d-block elements are listed in Table 23.2. Like sblock elements, d-block elements are also metals. But properties of these elements are markedly different from those of s-block elements. The interesting feature of the chemistry of transition elements is that sim ...
File
... before it inserts into growing chain. When catalyst and co-catalyst components are mixed , there occurs a chemisorption of the aluminium alkyl (electro positive in nature) on the Titanium Chloride solid surface, resulting in the formation of an electron deficient bridge complex as R ...
... before it inserts into growing chain. When catalyst and co-catalyst components are mixed , there occurs a chemisorption of the aluminium alkyl (electro positive in nature) on the Titanium Chloride solid surface, resulting in the formation of an electron deficient bridge complex as R ...
Oxidation
... Other nonmetals: the element closest to fluorine on the PT gets to keep its “usual” O.S. ...
... Other nonmetals: the element closest to fluorine on the PT gets to keep its “usual” O.S. ...
CHAPTER 20 METALLURGY AND THE CHEMISTRY OF METALS
... The water solubilities of the sulfates increase in the order Ra < Ba < Sr < Ca < Mg. The trend in this series is clearly in the sense of smaller ionic radius favoring greater solubility. Probably the smaller ion size results in much greater hydration energy (Section 6.7 of the text). Which sulfate i ...
... The water solubilities of the sulfates increase in the order Ra < Ba < Sr < Ca < Mg. The trend in this series is clearly in the sense of smaller ionic radius favoring greater solubility. Probably the smaller ion size results in much greater hydration energy (Section 6.7 of the text). Which sulfate i ...
Task 4 6 points - Austrian Chemistry Olympiad
... and styrene = vinylbenzene = ethenyl benzene. They were burnt in a bomb calorimeter with an excess of oxygen so that H2O(l) and CO2(g) were formed. Ignition was achieved by means of a wire whose heat of combustion in both cases was Qwire = -30.0 J. The lab assistand carrying out the experiments labe ...
... and styrene = vinylbenzene = ethenyl benzene. They were burnt in a bomb calorimeter with an excess of oxygen so that H2O(l) and CO2(g) were formed. Ignition was achieved by means of a wire whose heat of combustion in both cases was Qwire = -30.0 J. The lab assistand carrying out the experiments labe ...
... The coagulation-flocculation is one of the techniques used for the treatment of industrial wastewaters. In this process, the principle of treatment consists on destabilizing negative colloidal particles, by addition of salts metal cations. The positive charge of cations compresses the electrical dou ...
Formation, photodissociation, and structure studies of group 14(Si
... Group 14(Si, Ge, Sn, and Pb)/P binary cluster ions have been produced by laser ablation, photodissociated by UV laser and detected with a tandem time-of-flight mass spectrometer. As expected on the double periodicities of group 14 elements, Si/P and Ge/P binary cluster ions, whereas Sn/P and Pb/P bi ...
... Group 14(Si, Ge, Sn, and Pb)/P binary cluster ions have been produced by laser ablation, photodissociated by UV laser and detected with a tandem time-of-flight mass spectrometer. As expected on the double periodicities of group 14 elements, Si/P and Ge/P binary cluster ions, whereas Sn/P and Pb/P bi ...
Higher-Coordinated Molecular Silicon Compounds
... The chemistry of higher-coordinated – sometimes also called hypercoordinated and/or hypervalent silicon compounds – has been reviewed in several publications in the past. These references provided general overviews in the 1960s [13, 14], 1970s [15], 1980s [16], and the 1990s [17, 18]. More recently, ...
... The chemistry of higher-coordinated – sometimes also called hypercoordinated and/or hypervalent silicon compounds – has been reviewed in several publications in the past. These references provided general overviews in the 1960s [13, 14], 1970s [15], 1980s [16], and the 1990s [17, 18]. More recently, ...
High-valent metal-oxo complexes generated in catalytic oxidation
... [42]. When the reaction was conducted in H18 O was com2 O, pletely incorporated into adipic acid as revealed by the molecular ion peak of adipic acid at m/z = 155 ([M+H]+), which is 8 units higher than the mass number of adipic acid in H16 2 O [42]. This confirmed that all the oxygen atoms in adipic ...
... [42]. When the reaction was conducted in H18 O was com2 O, pletely incorporated into adipic acid as revealed by the molecular ion peak of adipic acid at m/z = 155 ([M+H]+), which is 8 units higher than the mass number of adipic acid in H16 2 O [42]. This confirmed that all the oxygen atoms in adipic ...
MSDsite
... The active site is critical for the understanding the action of proteins and their role within the cell mechanism. ...
... The active site is critical for the understanding the action of proteins and their role within the cell mechanism. ...
Coordination complex
In chemistry, a coordination complex or metal complex consists of a central atom or ion, which is usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents. Many metal-containing compounds, especially those of transition metals, are coordination complexes.