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Group 13 systems boron-phosphorus

More recently, imidazole- and pyrazole-type ligands with a phosphorus atom as the bridge have been reported,97,98 as depicted in formulae (46)-(48). Also rings with imidazolines (49)," or bridged by a —C—OH group (SO),100 have been reported. Boron-bridged polypyrazolylborates and related systems are dealt with in Chapter 13.6. [Pg.87]

Scheme 13).16 The presence of the BMes2 group induces a moderate downfield shift of the 31P NMR signal (by 2-3 ppm), suggesting only weak, if any, electron transfer from phosphorus to boron. Consistently, the UV-vis absorption band for 16a (/lmax 332 nm) is blue shifted compared with that of the related NB system (354 nm). [Pg.10]

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Boron Group

Boronate groups

Group 13 systems

Group 13 systems boron-phosphorus rings

Phosphorus systems

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