Dibenzyl- phosphine oxide

In the course of this study, the authors determined /Lvalues for dibenzyl, methyl phenyl, methyl p-nitrophenyl, di-p-tolyl, di-isopropyl and tetramethylene sulphoxides and for diethyl, dipropyl and dibutyl sulphites. The /Lscales are applied to the various reactions or the spectral measurements. The /Lscales have been divided into either family-dependent (FD) types, which means two or more compounds can share the same /Lscale, family-independent (FI) types. Consequently, a variety of /Lscales are now available for various families of the bases, including 29 aldehydes and ketones, 17 carboxylic amides and ureas, 14 carboxylic acids esters, 4 acyl halides, 5 nitriles, 10 ethers, 16 phosphine oxides, 12 sulphinyl compounds, 15 pyridines and pyrimidines, 16 sp3 hybridized amines and 10 alcohols. The enthalpies of formation of the hydrogen bond of 4-fluorophenol with both sulphoxides and phosphine oxides and related derivatives fit the empirical equation 18, where the standard deviation is y = 0.983. Several averaged scales are shown in Table 1588. 

A single short H bond links two phosphine oxide molecules in (Ph3PO)2H+ AuClj (13.34a) and two acid phosphate ions in KH5(P04)2 (13.34b). Continuous chains are formed in p-dichlorophenyl phosphate (13.34c), dimer rings in dibenzyl phosphoric acid (13.34d) and rings in the ruthenium complex (13.34e). 

The phosphinate 121 was formed by alkylation of isoprenyl-//-phosphinic acid 120 using A-bromoacetyl aspartic acid dibenzyl ester under silyl-Arbusov conditions. The resulting phosphinic acid was esterified using benzylbromide in the presence of silver oxide [105]. In one way, an ozonolysis of 121 followed by a... 

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