Synthesis and Characterization of New Strontium Complexes with Multidentate Ligands

Chanwoo Park; Chan Mi Cho; Bo Keun Park; Chang Seop Hong; Taek Mo Chung

doi:10.1002/slct.202104606

Synthesis and Characterization of New Strontium Complexes with Multidentate Ligands

Chanwoo Park, Chan Mi Cho, Bo Keun Park, Chang Seop Hong, Taek Mo Chung

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

1 Citation (Scopus)

Abstract

A series of new strontium complexes, [Sr(tmtad)(btsa)]₂ (1), [Sr(ptmtad)(btsa)]₂ (2), [Sr(etmtad)(btsa)]₂ (3), [Sr(tmtad)(tmhd)]₂ (4), [Sr(ptmtad)(tmhd)]₂ (5), and [Sr(etmtad)(tmhd)]₂ (6), were successfully synthesized by substitution reactions between btsa, aminoalkoxide ligands, and tmhdH (btsa=bis(trimethylsilyl) amide, tmtadH=2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, ptmtadH=2,5,7,9,12-pentamethyl-2,5,9,12-tetraazatridecan-7-ol, etmtadH=7-ethyl-2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, tmhdH=2,2,6,6-tetramethyl-3,5-heptanedione). Thermogravimetric analysis (TGA) of the new strontium compounds showed low residual masses (4-11 %) where complex 4 displayed the highest volatility and thermal stability. Single crystal X-ray study of complexes 1, 3, and 6 revealed that the respective complexes crystalize in a triclinic space group as a dimer with a hexa- or hepta-coordination. Furthermore, dimethylamino nitrogen atoms of aminoalkoxide ligands are freely pendent without coordinating to the central strontium metal due to their steric hindrance on the coordination sphere. Compounds 1–6 were characterized by ¹H- and ¹³C-nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, elemental analysis (EA), and thermogravimetric analysis.

Original language	English
Article number	e202104606
Journal	ChemistrySelect
Volume	7
Issue number	12
DOIs	https://doi.org/10.1002/slct.202104606
Publication status	Published - 2022 Mar 29

Bibliographical note

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Keywords

ALD precursor Strontium
Dimerization
Group 2 metal
Heteroleptic

ASJC Scopus subject areas

General Chemistry

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10.1002/slct.202104606

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@article{29ff25be3e414b7d9e98c1ca87dd521c,

title = "Synthesis and Characterization of New Strontium Complexes with Multidentate Ligands",

abstract = "A series of new strontium complexes, [Sr(tmtad)(btsa)]2 (1), [Sr(ptmtad)(btsa)]2 (2), [Sr(etmtad)(btsa)]2 (3), [Sr(tmtad)(tmhd)]2 (4), [Sr(ptmtad)(tmhd)]2 (5), and [Sr(etmtad)(tmhd)]2 (6), were successfully synthesized by substitution reactions between btsa, aminoalkoxide ligands, and tmhdH (btsa=bis(trimethylsilyl) amide, tmtadH=2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, ptmtadH=2,5,7,9,12-pentamethyl-2,5,9,12-tetraazatridecan-7-ol, etmtadH=7-ethyl-2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, tmhdH=2,2,6,6-tetramethyl-3,5-heptanedione). Thermogravimetric analysis (TGA) of the new strontium compounds showed low residual masses (4-11 %) where complex 4 displayed the highest volatility and thermal stability. Single crystal X-ray study of complexes 1, 3, and 6 revealed that the respective complexes crystalize in a triclinic space group as a dimer with a hexa- or hepta-coordination. Furthermore, dimethylamino nitrogen atoms of aminoalkoxide ligands are freely pendent without coordinating to the central strontium metal due to their steric hindrance on the coordination sphere. Compounds 1–6 were characterized by 1H- and 13C-nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, elemental analysis (EA), and thermogravimetric analysis.",

keywords = "ALD precursor Strontium, Dimerization, Group 2 metal, Heteroleptic",

author = "Chanwoo Park and Cho, {Chan Mi} and Park, {Bo Keun} and Hong, {Chang Seop} and Chung, {Taek Mo}",

note = "Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",

year = "2022",

month = mar,

day = "29",

doi = "10.1002/slct.202104606",

language = "English",

volume = "7",

journal = "ChemistrySelect",

issn = "2365-6549",

publisher = "Wiley-Blackwell Publishing Ltd",

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TY - JOUR

T1 - Synthesis and Characterization of New Strontium Complexes with Multidentate Ligands

AU - Park, Chanwoo

AU - Cho, Chan Mi

AU - Park, Bo Keun

AU - Hong, Chang Seop

AU - Chung, Taek Mo

PY - 2022/3/29

Y1 - 2022/3/29

N2 - A series of new strontium complexes, [Sr(tmtad)(btsa)]2 (1), [Sr(ptmtad)(btsa)]2 (2), [Sr(etmtad)(btsa)]2 (3), [Sr(tmtad)(tmhd)]2 (4), [Sr(ptmtad)(tmhd)]2 (5), and [Sr(etmtad)(tmhd)]2 (6), were successfully synthesized by substitution reactions between btsa, aminoalkoxide ligands, and tmhdH (btsa=bis(trimethylsilyl) amide, tmtadH=2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, ptmtadH=2,5,7,9,12-pentamethyl-2,5,9,12-tetraazatridecan-7-ol, etmtadH=7-ethyl-2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, tmhdH=2,2,6,6-tetramethyl-3,5-heptanedione). Thermogravimetric analysis (TGA) of the new strontium compounds showed low residual masses (4-11 %) where complex 4 displayed the highest volatility and thermal stability. Single crystal X-ray study of complexes 1, 3, and 6 revealed that the respective complexes crystalize in a triclinic space group as a dimer with a hexa- or hepta-coordination. Furthermore, dimethylamino nitrogen atoms of aminoalkoxide ligands are freely pendent without coordinating to the central strontium metal due to their steric hindrance on the coordination sphere. Compounds 1–6 were characterized by 1H- and 13C-nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, elemental analysis (EA), and thermogravimetric analysis.

AB - A series of new strontium complexes, [Sr(tmtad)(btsa)]2 (1), [Sr(ptmtad)(btsa)]2 (2), [Sr(etmtad)(btsa)]2 (3), [Sr(tmtad)(tmhd)]2 (4), [Sr(ptmtad)(tmhd)]2 (5), and [Sr(etmtad)(tmhd)]2 (6), were successfully synthesized by substitution reactions between btsa, aminoalkoxide ligands, and tmhdH (btsa=bis(trimethylsilyl) amide, tmtadH=2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, ptmtadH=2,5,7,9,12-pentamethyl-2,5,9,12-tetraazatridecan-7-ol, etmtadH=7-ethyl-2,5,9,12-tetramethyl-2,5,9,12-tetraazatridecan-7-ol, tmhdH=2,2,6,6-tetramethyl-3,5-heptanedione). Thermogravimetric analysis (TGA) of the new strontium compounds showed low residual masses (4-11 %) where complex 4 displayed the highest volatility and thermal stability. Single crystal X-ray study of complexes 1, 3, and 6 revealed that the respective complexes crystalize in a triclinic space group as a dimer with a hexa- or hepta-coordination. Furthermore, dimethylamino nitrogen atoms of aminoalkoxide ligands are freely pendent without coordinating to the central strontium metal due to their steric hindrance on the coordination sphere. Compounds 1–6 were characterized by 1H- and 13C-nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, elemental analysis (EA), and thermogravimetric analysis.

KW - ALD precursor Strontium

KW - Dimerization

KW - Group 2 metal

KW - Heteroleptic

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U2 - 10.1002/slct.202104606

DO - 10.1002/slct.202104606

M3 - Article

AN - SCOPUS:85127312611

SN - 2365-6549

VL - 7

JO - ChemistrySelect

JF - ChemistrySelect

IS - 12

M1 - e202104606

ER -

Synthesis and Characterization of New Strontium Complexes with Multidentate Ligands

Abstract

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Keywords

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