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Benzyl Ether‐Substituted Phosphido–Borane Complexes of the Alkali Metals
Author(s) -
Izod Keith,
Watson James M.,
Clegg William,
Harrington Ross W.
Publication year - 2012
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201101367
Subject(s) - chemistry , deprotonation , borane , alkali metal , ligand (biochemistry) , medicinal chemistry , metal , ether , yield (engineering) , crystallography , stereochemistry , inorganic chemistry , organic chemistry , catalysis , ion , biochemistry , materials science , receptor , metallurgy
Reduction of {(Me 3 Si) 2 CH}PCl(C 6 H 4 ‐2‐CH 2 OMe) withLiAlH 4 , followed by reaction with BH 3 · SMe 2 , gives the phosphane–borane {(Me 3 Si) 2 CH}PH(BH 3 )(C 6 H 4 ‐2‐CH 2 OMe) ( 2 ) in good yield. Compound 2 undergoes rapid deprotonation on treatment with n BuLi, PhCH 2 Na or PhCH 2 K to give the corresponding alkali metal phosphido–borane complexes [[{(Me 3 Si) 2 CH}P(BH 3 )(C 6 H 4 ‐2‐CH 2 OMe)]ML] 2 [ML = Li(THF) ( 3 ), Na(tmeda) ( 4 ), K(pmdeta) ( 5 )] after crystallization in the presence of the respective co‐ligand L. The exact binding mode of the phosphido–borane ligand depends on the nature of the metal center in each case. However, all three alkali metal complexes crystallize as discrete dimers exhibiting M–P, M–O and M ··· BH 3 contacts.