Structure and magnetic properties of a novel heteroheptanuclear metal string complex [Ni3Ru2Ni2(μ7-teptra)4(NCS)2](PF6)

Cheng-Chang Chiu; Ming-Chuan Cheng; Sheng-Hsiang Lin; Cheng-Wei Yan; Gene-Hsiang Lee; Mu-Chieh Chang; Tien-Sung Lin; Shie-Ming Peng

doi:10.1039/D0DT00156B

Structure and magnetic properties of a novel heteroheptanuclear metal string complex [Ni₃Ru₂Ni₂(μ₇-teptra)₄(NCS)₂](PF₆)†

Cheng-Chang Chiu,

^a Ming-Chuan Cheng,

^b Sheng-Hsiang Lin,

^a Cheng-Wei Yan,^a Gene-Hsiang Lee,

^a Mu-Chieh Chang,

*^a Tien-Sung Lin

*^a and Shie-Ming Peng

*^ab

Author affiliations

* Corresponding authors

^a Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., 10617 Taipei, Taiwan, Republic of China
E-mail: smpeng@ntu.edu.tw, lin@wustl.edu, mcchang1005@ntu.edu.tw

^b Institute of Chemistry, Academia Sinica, 128 Academia Road, Section 2, Nankang, Taipei, Taiwan, Republic of China

Abstract

We report the synthesis of a novel heteroheptanuclear metal string complex (HMSC) [Ni₃Ru₂Ni₂(μ₇-teptra)₄(NCS)₂](PF₆) 1 supported by tetra-pyridyl-tri-amine (H₃teptra) ligands. We employed X-ray diffraction and other spectroscopic techniques to characterize the complex. The observed remarkably short Ru–Ru distance of 2.2499(3) Å for 1 is indicative of a unique metal–metal interaction in the mixed-valence [Ru₂]⁵⁺ (S = 3/2) unit. The complex exhibits a relatively high magnetic moment value of 4.55 B.M. at 4 K, which increases rapidly to 6.00 B.M. at 30 K and remains at 6.11 B.M. from 50 to 300 K as shown by SQUID measurements, indicating a high spin (S ≥ 3/2) system which is further supported by the analyses of EPR spectra at low temperatures. These magnetic behaviors can be ascribed to the result of spin-exchange interactions among multi-spin centers.

This article is part of the themed collection: Spotlight Collection: Lanthanide and transition metal complexes as molecular magnets

Supplementary files

Article information

DOI: https://doi.org/10.1039/D0DT00156B
Article type: Paper
Submitted: 14 јан. 2020
Accepted: 21 апр. 2020
First published: 24 апр. 2020

Download Citation

Dalton Trans., 2020,49, 6635-6643

Permissions

Request permissions

Structure and magnetic properties of a novel heteroheptanuclear metal string complex [Ni₃Ru₂Ni₂(μ₇-teptra)₄(NCS)₂](PF₆)

C. Chiu, M. Cheng, S. Lin, C. Yan, G. Lee, M. Chang, T. Lin and S. Peng, Dalton Trans., 2020, 49, 6635 DOI: 10.1039/D0DT00156B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Dalton Transactions