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Die Kristallstruktur von Ph3PNBr · Br2

✍ Scribed by Frank Kunkel; Cäcilia Maichle-Mössmer; Joachim Strähle; Kurt Dehnicke

Publisher
John Wiley and Sons
Year
2001
Tongue
German
Weight
77 KB
Volume
627
Category
Article
ISSN
0372-7874

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✦ Synopsis

Ph 3 PNBr ´Br 2 (1) has been prepared besides of other products from the reaction of Ph 3 PNH with bromine, forming orange-yellow single crystals which are characterized by IR-spectroscopy and by a crystal structure determination. Space group P2 1 /n, Z = 4, lattice dimensions at 20 °C: a = 916.76(10), b = 1351.42(8), c = 1494.9(2) pm, b = 96.191(5)°, R 1 = 0.0538. 1 has a molecular structure in which the Br 2 molecule is coordinated at the nitrogen atom of the N-bromine-phosphoraneimine Ph 3 PNBr in a linear arrangement N±Br±Br with bond lengths N±Br of 224.5( ) pm and Br±Br of 248.4(1) pm. The nitrogen atom of 1 is w-tetrahedrally coordinated in addition by the phosphorus atom with a P±N distance of 165.3(6) pm and by the covalently bonded bromine atom with a bond length of 188.9(6) pm.

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Differenz-Ionisationskammer gemessen. Die Ergebnisse sind : ,,,,, = (1.130 h(Be0) -h(Be,O(CH,COO),) = (-0.724 k 0.057) x lO-'h(Be) h(Be0) -h(BeBr,) = (1.472 h(Be,O(CH,COO),) -h(BeF,),,,,,, = (1.852 k 0.082) x IO-'h(Be) h(Be0) -h(Be(C,H,),) = (0.795 i 0.074) x lo-' h(Be)