Synthesis of Novel Unsymmetric Strontium Complexes Containing Aminoalkoxides

Chanwoo Park, Heenang Choi, Jeong Min Hwang, Ji Hun Lee, Bo Keun Park, Ji Yeon Ryu, Chang Seop Hong, Taek Mo Chung

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Heteroleptic Sr complexes, [Sr(dmamp)(btsa)]2⋅DME (1), [Sr(dmamb)(btsa)]2⋅DME (2), [Sr(dmamp)(hfac)]3⋅DME (3), [Sr(dmamb)(hfac)]3⋅DME (4), [Sr(dmamp)(tmhd)]n (5), and Sr[(dmamb)(tmhd)]n (6) (dmampH=1-(dimethylamino)-2-methylpropan-2-ol, dmambH=1-(dimethylamino)-2-methylbutan-2-ol, DME=dimethoxyethane, hfacH=1,1,1,5,5,5-hexafluoropentadione, tmhdH=2,2,6,6-tetramethylheptane-3,5-dione, btsa=bis(trimethylsilyl)amide) were successfully prepared by two-step substitution reactions using aminoalkoxy and β-diketonate ligands. All complexes were characterized using various methods, including Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, elemental analysis, and thermogravimetric analysis. Single-crystal X-ray diffraction of crystals of 1 and 2 revealed dimeric structures with Sr metal centres connected by μ2-O bonding of an alkoxy O atom, whereas 3 was a trimer consisting of two μ3-O bridges and three μ2-O bridges by the dmamp and hfac ligands, respectively.

Original languageEnglish
Pages (from-to)7823-7828
Number of pages6
Issue number31
Publication statusPublished - 2021 Aug 20

Bibliographical note

Funding Information:
. 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 Wiley-VCH GmbH


  • dimerization
  • group 2 metal
  • heteroleptic
  • strontium
  • unsymmetric

ASJC Scopus subject areas

  • General Chemistry


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