Synthesis and Crystal Structures of New Strontium Complexes with Aminoalkoxy and β-Diketonato Ligands

Chanwoo Park; Jeong Min Hwang; Yongmin Go; Heenang Choi; Bo Keun Park; Chang Gyoun Kim; Ji Yeon Ryu; Chang Seop Hong; Taek Mo Chung

doi:10.1021/acsomega.1c01624

Synthesis and Crystal Structures of New Strontium Complexes with Aminoalkoxy and β-Diketonato Ligands

Chanwoo Park, Jeong Min Hwang, Yongmin Go, Heenang Choi, Bo Keun Park, Chang Gyoun Kim, Ji Yeon Ryu, Chang Seop Hong, Taek Mo Chung

Department of Chemistry

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

2 Citations (Scopus)

Abstract

New heteroleptic strontium complexes were synthesized using substitution reaction of bis(trimethylsilyl)amide of Sr(btsa)2·2DME with aminoalkoxide and β-diketonate ligands. The complexes [Sr(bdmp)(btsa)]2·2THF (1), [Sr(bdeamp)(btsa)]2 (2), [Sr(dadamb)(btsa)]2 (3), [Sr(bdmp)(hfac)]3 (4), [Sr(bdeamp)(hfac)]3 (5), [Sr(dadamb)(hfac)]3 (6), and [Sr3(dadamb)4(tmhd)2] (7) were prepared and characterized by means of various analysis techniques such as Fourier transform infrared, NMR, thermogravimetric analysis, and elemental analysis. Complexes 1-3 were further structurally confirmed by single-crystal X-ray crystallography, and they displayed dimeric structures in which strontium atoms were connected by alkoxide oxygen atoms of the μ2 type. Compound 1 has a trigonal prismatic structure, whereas 2 and 3 have a distorted square pyramidal structure. In complexes 5-7, trimeric structures were obtained with strontium atoms connected by μ3-O bonds of alkoxide oxygen atoms and μ2-O bonds of alkoxide and β-diketonate oxygen atoms. The crystal structures of 5, 6, and 7 showed distorted capped octahedral geometry, while 7 (middle Sr atom) displayed a distorted trigonal prism geometry. Complexes 5-7 displayed ∼70% mass loss in the temperature range from 25 to 315 °C.

Original language	English
Pages (from-to)	15948-15956
Number of pages	9
Journal	ACS Omega
Volume	6
Issue number	24
DOIs	https://doi.org/10.1021/acsomega.1c01624
Publication status	Published - 2021 Jun 22

Bibliographical note

Funding Information:
We are grateful to the Center for Chemical Analysis at the Korea Research Institute of Chemical Technology (KRICT) for allowing the use of their facilities and Bruker SMART APEX II for solving the crystal structures. This work was supported by the Materials and Components Technology Development Program (20010275, Development of ALD precursors for high k thin film in logic and DRAM Flash memory devices) funded by the Ministry of Trade, Industry & Energy (MOTIE, Republic of Korea) and the Development of smart chemical materials for IoT devices Project through the Korea Research Institute of Chemical Technology (KRICT) of Republic of Korea (SS2121-10).

Publisher Copyright:
© 2021 The Authors. Published by American Chemical Society.

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)

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10.1021/acsomega.1c01624

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@article{d409813cb1774bf19eec6179bcc89df8,

title = "Synthesis and Crystal Structures of New Strontium Complexes with Aminoalkoxy and β-Diketonato Ligands",

abstract = "New heteroleptic strontium complexes were synthesized using substitution reaction of bis(trimethylsilyl)amide of Sr(btsa)2·2DME with aminoalkoxide and β-diketonate ligands. The complexes [Sr(bdmp)(btsa)]2·2THF (1), [Sr(bdeamp)(btsa)]2 (2), [Sr(dadamb)(btsa)]2 (3), [Sr(bdmp)(hfac)]3 (4), [Sr(bdeamp)(hfac)]3 (5), [Sr(dadamb)(hfac)]3 (6), and [Sr3(dadamb)4(tmhd)2] (7) were prepared and characterized by means of various analysis techniques such as Fourier transform infrared, NMR, thermogravimetric analysis, and elemental analysis. Complexes 1-3 were further structurally confirmed by single-crystal X-ray crystallography, and they displayed dimeric structures in which strontium atoms were connected by alkoxide oxygen atoms of the μ2 type. Compound 1 has a trigonal prismatic structure, whereas 2 and 3 have a distorted square pyramidal structure. In complexes 5-7, trimeric structures were obtained with strontium atoms connected by μ3-O bonds of alkoxide oxygen atoms and μ2-O bonds of alkoxide and β-diketonate oxygen atoms. The crystal structures of 5, 6, and 7 showed distorted capped octahedral geometry, while 7 (middle Sr atom) displayed a distorted trigonal prism geometry. Complexes 5-7 displayed ∼70% mass loss in the temperature range from 25 to 315 °C.",

author = "Chanwoo Park and Hwang, {Jeong Min} and Yongmin Go and Heenang Choi and Park, {Bo Keun} and Kim, {Chang Gyoun} and Ryu, {Ji Yeon} and Hong, {Chang Seop} and Chung, {Taek Mo}",

note = "Funding Information: We are grateful to the Center for Chemical Analysis at the Korea Research Institute of Chemical Technology (KRICT) for allowing the use of their facilities and Bruker SMART APEX II for solving the crystal structures. This work was supported by the Materials and Components Technology Development Program (20010275, Development of ALD precursors for high k thin film in logic and DRAM Flash memory devices) funded by the Ministry of Trade, Industry & Energy (MOTIE, Republic of Korea) and the Development of smart chemical materials for IoT devices Project through the Korea Research Institute of Chemical Technology (KRICT) of Republic of Korea (SS2121-10). Publisher Copyright: {\textcopyright} 2021 The Authors. Published by American Chemical Society.",

year = "2021",

month = jun,

day = "22",

doi = "10.1021/acsomega.1c01624",

language = "English",

volume = "6",

pages = "15948--15956",

journal = "ACS Omega",

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publisher = "American Chemical Society",

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T1 - Synthesis and Crystal Structures of New Strontium Complexes with Aminoalkoxy and β-Diketonato Ligands

AU - Park, Chanwoo

AU - Hwang, Jeong Min

AU - Go, Yongmin

AU - Choi, Heenang

AU - Park, Bo Keun

AU - Kim, Chang Gyoun

AU - Ryu, Ji Yeon

AU - Hong, Chang Seop

AU - Chung, Taek Mo

N1 - Funding Information: We are grateful to the Center for Chemical Analysis at the Korea Research Institute of Chemical Technology (KRICT) for allowing the use of their facilities and Bruker SMART APEX II for solving the crystal structures. This work was supported by the Materials and Components Technology Development Program (20010275, Development of ALD precursors for high k thin film in logic and DRAM Flash memory devices) funded by the Ministry of Trade, Industry & Energy (MOTIE, Republic of Korea) and the Development of smart chemical materials for IoT devices Project through the Korea Research Institute of Chemical Technology (KRICT) of Republic of Korea (SS2121-10). Publisher Copyright: © 2021 The Authors. Published by American Chemical Society.

PY - 2021/6/22

Y1 - 2021/6/22

N2 - New heteroleptic strontium complexes were synthesized using substitution reaction of bis(trimethylsilyl)amide of Sr(btsa)2·2DME with aminoalkoxide and β-diketonate ligands. The complexes [Sr(bdmp)(btsa)]2·2THF (1), [Sr(bdeamp)(btsa)]2 (2), [Sr(dadamb)(btsa)]2 (3), [Sr(bdmp)(hfac)]3 (4), [Sr(bdeamp)(hfac)]3 (5), [Sr(dadamb)(hfac)]3 (6), and [Sr3(dadamb)4(tmhd)2] (7) were prepared and characterized by means of various analysis techniques such as Fourier transform infrared, NMR, thermogravimetric analysis, and elemental analysis. Complexes 1-3 were further structurally confirmed by single-crystal X-ray crystallography, and they displayed dimeric structures in which strontium atoms were connected by alkoxide oxygen atoms of the μ2 type. Compound 1 has a trigonal prismatic structure, whereas 2 and 3 have a distorted square pyramidal structure. In complexes 5-7, trimeric structures were obtained with strontium atoms connected by μ3-O bonds of alkoxide oxygen atoms and μ2-O bonds of alkoxide and β-diketonate oxygen atoms. The crystal structures of 5, 6, and 7 showed distorted capped octahedral geometry, while 7 (middle Sr atom) displayed a distorted trigonal prism geometry. Complexes 5-7 displayed ∼70% mass loss in the temperature range from 25 to 315 °C.

AB - New heteroleptic strontium complexes were synthesized using substitution reaction of bis(trimethylsilyl)amide of Sr(btsa)2·2DME with aminoalkoxide and β-diketonate ligands. The complexes [Sr(bdmp)(btsa)]2·2THF (1), [Sr(bdeamp)(btsa)]2 (2), [Sr(dadamb)(btsa)]2 (3), [Sr(bdmp)(hfac)]3 (4), [Sr(bdeamp)(hfac)]3 (5), [Sr(dadamb)(hfac)]3 (6), and [Sr3(dadamb)4(tmhd)2] (7) were prepared and characterized by means of various analysis techniques such as Fourier transform infrared, NMR, thermogravimetric analysis, and elemental analysis. Complexes 1-3 were further structurally confirmed by single-crystal X-ray crystallography, and they displayed dimeric structures in which strontium atoms were connected by alkoxide oxygen atoms of the μ2 type. Compound 1 has a trigonal prismatic structure, whereas 2 and 3 have a distorted square pyramidal structure. In complexes 5-7, trimeric structures were obtained with strontium atoms connected by μ3-O bonds of alkoxide oxygen atoms and μ2-O bonds of alkoxide and β-diketonate oxygen atoms. The crystal structures of 5, 6, and 7 showed distorted capped octahedral geometry, while 7 (middle Sr atom) displayed a distorted trigonal prism geometry. Complexes 5-7 displayed ∼70% mass loss in the temperature range from 25 to 315 °C.

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U2 - 10.1021/acsomega.1c01624

DO - 10.1021/acsomega.1c01624

M3 - Article

AN - SCOPUS:85108561211

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JF - ACS Omega

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ER -

Synthesis and Crystal Structures of New Strontium Complexes with Aminoalkoxy and β-Diketonato Ligands

Abstract

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