EurJIC

A Journal of

European Journal of
Inorganic Chemistry

11/2017www.eurjic.org

Front CoverTomoaki Tanase et al.
Linear Triplatinum Tetrahydride Complex Supported by TriphosphineLigands, [Pt3(μ-H)2(H)2(μ-dpmp)2](BF4)2 {dpmp =bis(diphenylphosphinomethyl)phenylphosphine}

Cover Profile
DOI: 10.1002/ejic.201700205

Read the full text of the article at 10.1002/ejic.201601505

Linear Triplatinum Tetrahydride Complex Supportedby Triphosphine Ligands, [Pt3(μ-H)2(H)2(μ-dpmp)2](BF4)2{dpmp = bis(diphenylphosphinomethyl)phenylphosphine}

Invited for the cover of this issue is the group of Tomoaki Tanase at Nara Women’s University, Japan. The
cover image shows the transformation of linear trihydride hexaplatinum complex Pt6H3 to a novel linear
triplatinum tetrahydride (Pt3H4) by treatment with HBF4.
In one word, how would you describe your research?
Long history! For more than 20 years, we have tried to explore
linearly extended metallic molecular wires by utilizing linear
polyphosphines, which could be useful building blocks fornanostructured molecular devices.

Who designed the cover?
The cover was designed by Tomoaki Tanase. It shows the reaction of Pt6H3 to Pt3H4 on the basis of possible transformationroutes on a backdrop of blue sky over the memorial lecture hallat Nara Women’s University.

What prompted you to investigate this topic?
Hydride-bridged Pt3HPt3 chains were reported by our group in
2004, and we recently synthesized the trihydride hexaplatinumcomplex HPt3HPt3H. This complex is a promising building blockfor further extended metal atom chains, as the terminal
hydrides can connect linear Pt3 units, and hence, the reactivity
with hydrogen species, H+, H2, and H–, is very important. Therefore, the reaction of the Pt6H3 chain with HBF4 was investigated.

Acknowledgment
We thank for financial support from the Ministry of Education,Culture, Sports, Science and Technology, Japan (MEXT), Japan
Society for the Promotion of Science (JSPS), and Nara Women’s
University (NWU). We are also grateful to Prof. Kohtaro Osakadaof Tokyo Institute of Technology for his help with spectral andanalytical measurements. The theoretical computations wereperformed at the Research Center for Computational Science,Okazaki, Japan.

What is the most significant result of this study?
The triplatinum unit {Pt3(μ-dpmp)2}2+ (Pt3II) acts as a fourelectron reservoir to afford linear complex Pt3H4 (Pt3VI) throughprotonation. Pt3VI could be a useful building block for linearlyextended molecular metallic wires connected by hydride
bridges.
What is the next challenge?
To connect the Pt3 units by using hydride glue as well as deprotonation and dehydrogenation redox processes. It is alsofascinating to explore chemically modified electrodes for electrochemical hydrogenation.
What other topics are you working on at the moment?
By using linearly designed tetraphosphines, meso/racPh2PCH2PPh(CH2)nP(Ph)CH2PPh2 (n = 1–4), we have synthesizeda variety of structurally constrained transition metal clusters
and investigated their structures, properties, and reactivity. Our
ongoing projects involve (1) linear Pd8 rods from self-alignmentof Pd4 units, (2) strongly luminous Au4 chains and {Au2AgCu}2rings, (3) multinuclear Cu–hydride complexes and their reactions with CO2, and (4) reversible O2 binding to Rh2 and Ir2complexes.
Eur. J. Inorg. Chem. 2017, 1421

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