Phosphorus stoichiometry

Downing, J.A. (1997) Marine nitrogen phosphorus stoichiometry and the global N P cycle. Biogeochemistry 37, 237-252. 

Karl, D. M., et al. (2001b). Ecological nitrogen-to-phosphorus stoichiometry at station ALOHA. Deep Sea Res. II. 48(8-9), 1529-1566. 

Variability in biological and dissolved nitrogen phosphorus stoichiometry... 

Another source of departure from stoichiometry occurs when cations are reduced, as for example in tire reduction of zinc oxide to yield an oxygen-defective oxide. The zinc atoms which are formed in tlris process dissolve in the lattice, Zn+ ions entering interstitial sites and the coiTesponding number of electrons being released from these dissolved atoms in much the same manner as was found when phosphorus was dissolved in the Group IV semiconductors. The Kroger-Viirk representation of dris reduction is... 

Co-condensation of Hf and Zr atoms from an electron-gun evaporation device, with P(Me)3 and arenes at 77K gave good yields of the species [M(arene)2P(Me3)]. Metal vapor synthesis led to Fe(i7 -arene)L2 and Fe(i7 -arene)-(i7 -diene), where L is a phosphorus ligand. In addition, complexes of stoichiometry Fe(T) -diene)L3 (where L is again a... 

C21-0094. Phosphorus(V) oxide has a very strong affinity for water hence, it is often used as a drying agent in laboratory desiccators. One mole of P4 Oio reacts with six moles of water. Based on this stoichiometry, identify the product of the reaction and balance the equation. 

PMMA and Model Reactions. Reactions between PMMA and red phosphorus were carried out with the ratio of PMMA to red phosphorus varying from 10 1 to 1 1, i.e., 1.0g PMMA and 0.1 g phosphorus to 1.0g PMMA and 1.0g phosphorus, at temperatures ranging from 300°C to 375°C. The PMMA-rhodium system used a 1.0g sample of PMMA and 0.5g of CIRh(PPh3)3 at 260°C for 2 hours. Reactions with the model compound, dimethyiglutarate, DMG, utilized a 1 1 stoichiometry, 0.17g DMG and 1.0g CIRh(PPh3)3 (4-7). 

In flame calorimetry, it is not easy to measure directly with good accuracy the mass of reactants consumed in the combustion. Therefore, the results are always based on the quantitative analysis of the products and the stoichiometry of the combustion process. In the case of reaction 7.73, the H20 produced was determined from the increase in mass of absorption tubes such as M, containing anhydrous magnesium perchlorate and phosphorus pentoxide [54,99], When organic compounds are studied by flame combustion calorimetry, the mass of C02 formed is also determined. As in bomb calorimetry, this is done by using absorption tubes containing Ascarite [54,90]. 

The closo-tetraphosphorus sulfides, with their various stoichiometries and unique structures (Scheme 2), exhibit multiple and often distinct potential coordination sites. These sites often involve several distinct sets of formally non-bonding electron pairs at both phosphorus and sulfur atoms, and the tetraphosphorus sulfides could therefore be expected to exhibit a wide range of coordination modes and original behavior towards Lewis acids. But so far this has not proved so. 

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