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Synthesis and Characterization of Methylzinc Tri(tert‐butyl)silylphosphanide as well as Related Sodium and Potassium Phosphanylzincates
Author(s) -
Sapelza Gerhard,
Mayer Peter,
Westerhausen Matthias
Publication year - 2005
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200500313
Subject(s) - chemistry , dimethylzinc , potassium , toluene , sodium , deprotonation , medicinal chemistry , solvent , zinc , inorganic chemistry , stereochemistry , ion , organic chemistry
The reaction of dimethylzinc and tri(tert‐butyl)silylphosphane in toluene yielded dimeric methylzinc tri(tert‐butyl)silylphosphanide ( 1 ) which crystallized tetrameric. Compound 1 was deprotonated with sodium in DME and the solvent‐separated dimeric ion pair [(dme) 3 Na] + [(dme)Na(MeZn) 2 (μ‐PSi t Bu 3 ) 2 ] − ( 2 ) was isolated. The reaction of 1 in THF with two equivalents of potassium and one equivalent of tri(tert‐butyl)silylphosphane gave dimeric [{ t Bu 3 Si(H)P}{(thf) 2 K} 2 (MeZn)(PSi t Bu 3 )] 2 ( 3 ). Both of these phosphanylzincates contain Zn 2 P 2 cycles with Zn‐P bond lengths of approximately 237 pm, whereas in 1 larger Zn‐P bond lengths of 248.5 pm were found due to the larger coordination numbers of the phosphorus and zinc atoms.