Premium
Cyclopropylmagnesium Scorpionates: A Missing Member of the Series with Both Staggered and Eclipsed Rotamers in the Crystal
Author(s) -
Dufrois Quentin,
MalletLadeira Sonia,
Dinoi Chiara,
Etienne Michel
Publication year - 2018
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.201800073
Subject(s) - chemistry , agostic interaction , steric effects , conformational isomerism , yield (engineering) , ligand (biochemistry) , crystallography , stereochemistry , alkyl , medicinal chemistry , hydrogen bond , boron , molecule , organic chemistry , metal , receptor , biochemistry , materials science , metallurgy
The reaction of the hydrotris(3,5‐dimethylpyrazolyl)borate potassium salt KTp Me2 with [Mg( c ‐C 3 H 5 ) 2 (dioxane) x ] gives [Tp Me2 Mg( c ‐C 3 H 5 )] ( 1 ) in 70 % yield. Full characterization includes an X‐ray diffraction study, which reveals the presence of both staggered and eclipsed rotamers around the Mg–C bond of 1 in the unit cell. There is no evidence for any agostic interaction. Complex 1 does not undergo the Schlenk equilibrium. The complex [(F 12 ‐Tp 4Bo,3Ph )Mg( c ‐C 3 H 5 )] ( 2 ) containing a hydrotris(tetrafluoro‐3‐phenylindazolyl)borate scorpionate ligand, is obtained in 20 % yield. Complex 2 proved to be significantly more labile than 1 , solutions of 2 giving readily [Mg(F 12 ‐Tp 4Bo,3Ph ) 2 ] ( 3 ). This study emphasizes the importance of tuning the steric and electronic properties of the scorpionate ligands for the stabilization of heteroleptic magnesium alkyl complexes.