Field-Induced Slow Magnetic Relaxation in the Ni(I) Complexes [NiCl(PPh3)2]·C4H8O and [Ni(N(SiMe3)2)(PPh3)2

Inorganic Chemistry
Weiquan LinAndreas Eichhöfer

Abstract

Direct current (dc) and alternating current (ac) magnetic measurements have been performed on the three Ni(I) complexes: [NiCl(PPh3)3], [NiCl(PPh3)2]·C4H8O, and [Ni(N(SiMe3)2)(PPh3)2]. Fits of the dc magnetic data suggest an almost similar behavior of the three compounds, which display only moderate deviations from the spin-only values. The ac magnetic investigations reveal that the two complexes with trigonal planar coordination--[NiCl(PPh3)2]·C4H8O and [Ni(N(SiMe3)2)(PPh3)2]--display slow magnetic relaxation at low temperatures under applied dc fields, whereas tetrahedral [NiCl(PPh3)3] does not. Ground and excited states as well as magnetic data were calculated by ab initio wave function based multi-configurational methods, including dynamic correlation as well as spin-orbit coupling. The two trigonal planar complexes comprise well-isolated S = (1)/2 ground states, whereas two S = (1)/2 states with a splitting of less than 100 cm(-1) were found in the tetrahedral compound.

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Citations

Sep 17, 2016·Inorganic Chemistry·Silvia SottiniPanayotis Kyritsis
Jan 10, 2017·Inorganic Chemistry·Roman BočaDušan Valigura
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Jul 17, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Shu-Yang ChenZi-Ling Xue
Nov 13, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Lei ChenZhong-Wen Ouyang
Jul 13, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Kaiji UchidaMasahiro Yamashita
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May 9, 2019·Chemistry : a European Journal·Mei DingJeremy M Smith
Jul 19, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Ján TitišRoman Boča
Nov 21, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Agnieszka MielcarekAnna Dołęga
Mar 7, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Qian-Qian SuTai-Chu Lau

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