One to one complexes of the bicyclic phosphite, CH3C(CH20)3P, have been prepared with the acids BH3, B3H7, B(CH3)3, and BF3. The compound CH3C(CH20)3PBH3 has a melting point of 199°and a measured dipole moment of 8.60 ± 0.05 D. This is in good agreement with a value estimated using additive bond moments. Trimethylamine will remove BH3 groups from the complex to give CH3C(CH20)3P and (CH3)3NBH3. AH for the process: CH3C(CH20)3P<8) + B(CH3)3(g) = CH3C(CH20)3PBH3to is estimated to be -14.4 ± 0.5 kcal./mole on the basis of pressure-temperature data. Comparable data for the complex (CH3)3NB(CH3)s give an approximate value of -25 kcal./mole. The foregoing values suggest that CH3C(CH20)3P is a weaker base toward both BH3 and B(CH3)3 than is trimethylamine.CONTRIBUTION FROM THE METCALF CHEMICAL LABORATORIES OF BROWN UNIVERSITY, PROVIDENCE 12, RHODE ISLAND Coordination Compounds of Ethylenimine with Cobalt(III), Chromium(III), Palladium(II), Platinum(II), and Platinum(IV)
number of 1:1 adducts of the two polycyclic phosphites 4-methyl-2,6,7-trioxa-l-phosphabicyclo [2.2.2 ]octane, C5H9O3P, and l-phospha-2,8,9trioxaadamantane, CgHgOsP, with several boron Lewis acids have been synthesized and characterized.2,3
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