Other Constructs

Molybdenum imido alkylidene complexes that contain bulky carboxylate ligands have been prepared and evaluated for the cyclopolymerizations of 

Tungsten alkylidene and alkylidyne complexes have been described that contain the trianionic pincer ligand [t-BuOCO] [74]. A reaction between ( -BuO)3W=C- -Bu, 2,6-(2-OH-3- -BuC6H3)2C6H4 ([t-BuOCOlHg), and 

The addition of [CFj-ONOJHj to (l-BuO)3W=CEt led to the formation of the propylidene complex, [CF3-0N0]W(CHEt)(0-t-Bu), which has a distorted, SP geometry with the propylidene ligand in the apical position (Eq. (1.13)) [75]. The Ph3PCH2 can then deprotonate [CF3-0N0]W(CHEt)(0-l-Bu) to yield the anionic alkylidyne complex, [CF3-0N0]W(CEt)(0-l-Bu) [Ph3PMe], which - upon the addition of MeOTf - led to the formation of the disubstituted methylidene species, [CF3-0N0]W[C(Me)(Et)](0-l-Bu). 

The addition of trimethylphosphine to (Me3SiCH2)3W=CSiMe3 at low temperatures yielded a PMeg adduct that was in equilibrium with a PMe3 adduct 

The author thanks the National Science Foundation for supporting research on multiple metal-carbon bonds and metallacycles, and the many coworkers who have contributed to high-oxidation state alkylidene chemistry. 

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Copper To 1500 Properties depend on other construction materials and form of copper used. Packing made of copper foil over asbestos core resists steam and alkalies to lOOO F. Packing of braided copper tinsel resists water, steam, and gases to 1500 F. 

A diagnosis of possible damage should be made before beginning repairs with other construction measures [48,49]. There should be a checklist [48] of the important corrosion parameters and the types of corrosion effects to be expected. Of special importance are investigations of the quality of the concrete (strength, type of cement, water/cement ratio, cement content), the depth of carbonization, concentration profile of chloride ions, moisture distribution, and the situation regarding cracks and displacements. The extent of corrosion attack is determined visually. Later the likelihood of corrosion can be assessed using the above data. 

Fluorinated polymers stand out sharply against other construction materials for their excellent corrosion resistance and high-temperature stability. In this respect they are not only superior to other plastics but also to platinum, gold, glass, enamel and special alloys. The fluorinated plastics used in process plants are polytetrafluorethylene (PTFE), fluorinated ethylene/ propylene (FEP), polytrifiuoromonochlorethylene (PTFCE) and polyvinyl fluoride (PVF). They are much more expensive than other polymers and so are only economical in special situations [59]. 

Typical sizes and constructions of wire rope for oilfield service are shown in Table 4-30. Because of the variety of equipment designs, the selection of other constructions than those shown is justifiable. 

Re-use of cladding or other construction materials smoke ventilation, drainage, fire detection/suppression systems or techniques to reflect the existing installations may not comply with current requirements, particularly with respect to ... 

Most wood species are subject to some form of biological attack, a hazard not encountered by most other constructional materials. Fungal decay and attack by termites and other insect borers and marine borers are the main problems. The heartwood of many timber species and the sapwood of most species can be impregnated with wood preservatives to prevent these problems. 

Conducted heat is that going in through cold store surfaces, tank sides, pipe insulation, etc. It is normally assumed to be constant and the outside temperature an average summer temperature, probably 25-2/°C for the UK, unless some other figure is known. Coldroom surfaces are measured on the outside dimensions and it is usual to calculate on the heat flow through the insulation only, ignoring other construction materials, since their thermal resistance is small. 

Without any doubt the microporous polyethylene pocket will meet all requirements of modern starter batteries for the foreseeable future. Whether and to what extent other constructions, such as valve-regulated lead-acid batteries, other battery systems, or even supercapacitors, will find acceptance, depends — besides the technical aspects — on the emphasis which is placed on the ecological or economical factors. 

A measurement of force per unit area on, or within metals and other construction materials. Excess stress can lead to metal failure. 

Alfred Nobel s invention made blasting rock, building canals, digging tunnels, and many other construction tasks much easier. 

Hydraulic fluids are a very large class of materials that are used in machines and equipment to transfer pressure from one point to another. They are used in many ways including all fluids for car automatic transmissions, brakes, and power steering. Hydraulic fluids are also used in many machines like tractors and other farm equipment, forklift trucks, bulldozers, and other construction equipment, and airplanes. In industry, hydraulic fluids are used in machines that push, lift, pull, turn, and hold things. This profile covers only three of the many types of... 

Although it is more desirable to remove unreliable underground tanks, a tank may be abandoned in place, for example, when it is indoors, under a building, beneath a foundation, or barricaded with other constructions. 

It does not seem clear which procedure is easier to implement or more efficient (if and when it works ). Both can be augmented to handle other constructions in any particular programming language. The first procedure is augmented by changing the PATH VERIFICATION CONDITION GENERATOR and the second by adding additional axioms or rules to the THEOREM PROVER. 

Electrolyzers are generally current-controlled, which means that a certain DC is imposed according to the desired hydrogen production. In a wind-hydrogen system, the wind turbine power available for the operation of the electrolyzer is generally known therefore, the power input should be transformed to a current input. The voltage-current relation of an electrolyzer is not very simple because it depends on the temperature, pressure, and other construction characteristics. For a given electrolyzer, it is possible to experimentally establish the I-V curve at different temperatures and pressures, and deduce a temperature-dependent current-power curve. 

In office buildings it is very common to have plenums, i.e. spaces above rooms where the air handling system is located, together with electrical wires and cables, as well as abundant wood and other construction materials. These concealed spaces are usually ca. 1 m (3 ft) high and are invisible from the room below. 

Threaded joints in which the tightness of the joint is provided by a seating surface other than the threads, e.g., a union comprising male and female ends joined with a threaded union nut, or other constructions shown typically in Fig. IP-9.13(c), may be used. 

This chapter discusses the various phases of installation of fire protection systems. Fire protection projects vary from new construction projects to retrofitting an existing system in a facility. Managing a fire protection system project is very much like any other construction or capital improvement project. The... 

The timing of installation of fire protection systems is important because it must be integrated with other construction activities. Fire protection is generally a small but important element of the overall project. To ensure a timely and efficient installation, the person responsible for scheduling the installation must... 

Unit cost values for excavation, geomembranes, or clay cell liners and other construction costs are identical for both anaerobic and aerobic passive-treatment systems. 

War captives were used to hack out hundreds of miles of mines, irrigation canals and for other constructions by the ancient Egyptians. 

The abundance of limestone deposits throughout the world has resulted in the use of calcium carbonate as a primary building material since antiquity. The ancient pyramids and the Sphinx in Egypt were made almost exclusively with limestone 5,000 years ago. Most limestone is used today as construction material. One estimate is that the United States used a billion tons of crushed limestone for roads, dams, fill, buildings, and various other construction uses in 2005. 

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