More than steric effects: Unlocking the coordination chemistry of barium pyrazolates

Anna Y. O'Brien; Julia Hitzbleck; Ana Torvisco; Glen B. Deacon; Karin Ruhlandt-Senge

doi:10.1002/ejic.200701020

More than steric effects: Unlocking the coordination chemistry of barium pyrazolates

Anna Y. O'Brien, Julia Hitzbleck, Ana Torvisco, Glen B. Deacon, Karin Ruhlandt-Senge^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	172-182
Number of pages	11
Journal	European Journal of Inorganic Chemistry
Issue number	1
DOIs	https://doi.org/10.1002/ejic.200701020
Publication status	Published - 2008

Keywords

Barium
Coordination modes
CVD precursors
N ligands
Pyrazolates
Structure elucidation
Synthetic methods

ASJC Scopus subject areas

Inorganic Chemistry

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10.1002/ejic.200701020

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title = "More than steric effects: Unlocking the coordination chemistry of barium pyrazolates",

abstract = "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.",

keywords = "Barium, Coordination modes, CVD precursors, N ligands, Pyrazolates, Structure elucidation, Synthetic methods",

author = "O'Brien, {Anna Y.} and Julia Hitzbleck and Ana Torvisco and Deacon, {Glen B.} and Karin Ruhlandt-Senge",

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journal = "European Journal of Inorganic Chemistry",

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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 - Coordination modes

KW - CVD precursors

KW - N ligands

KW - Pyrazolates

KW - Structure elucidation

KW - Synthetic methods

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M3 - Article

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JO - European Journal of Inorganic Chemistry

JF - European Journal of Inorganic Chemistry

IS - 1

ER -

More than steric effects: Unlocking the coordination chemistry of barium pyrazolates

Abstract

Keywords

ASJC Scopus subject areas

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