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Di(2-ethylhexyl)phosphoric acid (DEHPA or HDEHP) is an organophosphorus compound with the formula (C 8 H 17 O) 2 PO 2 H. The colorless liquid is a diester of phosphoric acid and 2-ethylhexanol . It is used in the solvent extraction of uranium , vanadium and the rare-earth metals .
It is helpful to write the numbers C j in a different form, by choosing three numbers θ 1, θ 2, θ 3 with e 2πiθ j = C j: (+) = Again, the θ j are three numbers which do not depend on r. Define k = θ 1 b 1 + θ 2 b 2 + θ 3 b 3 , where b j are the reciprocal lattice vectors (see above).
Alitretinoin. For organic molecules with multiple double bonds, it is sometimes necessary to indicate the alkene location for each E or Z symbol. For example, the chemical name of alitretinoin is (2E,4E,6Z,8E)-3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexenyl)nona-2,4,6,8-tetraenoic acid, indicating that the alkenes starting at positions 2, 4, and 8 are E while the one starting at position 6 is Z.
[4] α-Sulfur is the predominant form found in "flowers of sulfur", "roll sulfur" and "milk of sulfur". [19] It contains S 8 puckered rings, alternatively called a crown shape. The S–S bond lengths are all 203.7 pm and the S-S-S angles are 107.8° with a dihedral angle of 98°. [16] At 95.3 °C, α-sulfur converts to β-sulfur. [4]
where A and B are reactants C is a product a, b, and c are stoichiometric coefficients,. the reaction rate is often found to have the form: = [] [] Here is the reaction rate constant that depends on temperature, and [A] and [B] are the molar concentrations of substances A and B in moles per unit volume of solution, assuming the reaction is taking place throughout the volume of the ...
Its form can be motivated by modeling momentum transport at the molecular level as an activated ... 600–1200 Hydrazine: N 2 H 4: 0.03625 683.29 83.603 280–450 ...
The 3D polymeric network of hydrogels is highly hydrated with 90-99% water w/w; it is capable of binding many times more water molecules when assembled than in the uncross-linked state. [2] [3] Hydrogel dressings can absorb up to 600 times their initial amount of water, including fluid-based wound exudates.