TY - JOUR
T1 - More than steric effects
T2 - Unlocking the coordination chemistry of barium pyrazolates
AU - O'Brien, Anna Y.
AU - Hitzbleck, Julia
AU - Torvisco, Ana
AU - Deacon, Glen B.
AU - Ruhlandt-Senge, Karin
PY - 2008
Y1 - 2008
N2 - To further our understanding of the coordination chemistry of the heavy alkaline earth metals, we here report on a family of barium pyrazolates bearing various substitution patterns that illustrate the delicate balance between ligand bulk, donor size, stoichiometry, and hapticity, while emphasizing the importance of secondary interactions including π-bonding, agostic interactions, and hydrogen bonding to stabilize these heavy-metal complexes. The dimeric compounds [{Ba(Me2pz)2(pmdta)}2] (1), [{Ba(Phpz)2(pmdta)}2] (2), [{Ba(tBupz)2(pmdta)} 2] (3), [{Ba(MePhpz)2(tmeda)}2] (5), [{Ba(Ph2pz)2(tmeda)}2]·TMEDA (6), the polymer [{Ba(tBupz)2(NH3)2}n] (4), and the monomer [Ba(Ph2pz)2(tmeda)2] ·TMEDA (7), were prepared using a variety of synthetic methods and were characterized spectroscopically and structurally.
AB - To further our understanding of the coordination chemistry of the heavy alkaline earth metals, we here report on a family of barium pyrazolates bearing various substitution patterns that illustrate the delicate balance between ligand bulk, donor size, stoichiometry, and hapticity, while emphasizing the importance of secondary interactions including π-bonding, agostic interactions, and hydrogen bonding to stabilize these heavy-metal complexes. The dimeric compounds [{Ba(Me2pz)2(pmdta)}2] (1), [{Ba(Phpz)2(pmdta)}2] (2), [{Ba(tBupz)2(pmdta)} 2] (3), [{Ba(MePhpz)2(tmeda)}2] (5), [{Ba(Ph2pz)2(tmeda)}2]·TMEDA (6), the polymer [{Ba(tBupz)2(NH3)2}n] (4), and the monomer [Ba(Ph2pz)2(tmeda)2] ·TMEDA (7), were prepared using a variety of synthetic methods and were characterized spectroscopically and structurally.
KW - Barium
KW - CVD precursors
KW - Coordination modes
KW - N ligands
KW - Pyrazolates
KW - Structure elucidation
KW - Synthetic methods
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U2 - 10.1002/ejic.200701020
DO - 10.1002/ejic.200701020
M3 - Article
AN - SCOPUS:38349191393
SN - 1434-1948
SP - 172
EP - 182
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
IS - 1
ER -