Details

Autor(en) / Beteiligte

• Brocha Silalahi, Rhone P
• Huang, Guan-Rong
• Liao, Jian-Hong
• Chiu, Tzu-Hao
• Chakrahari, Kiran Kumarvarma
• Wang, Xiaoping
• Cartron, Julien
• Kahlal, Samia
• Saillard, Jean-Yves
• Liu, C. W

Titel

Copper Clusters Containing Hydrides in Trigonal Pyramidal Geometry

Ist Teil von

• Inorganic chemistry, 2020-02, Vol.59 (4), p.2536-2547

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Structurally precise copper hydrides [Cu11H2{S2P­(O i Pr)2}6(CCR)3], R = Ph (1), C6H4F (2), and C6H4OMe (3), were first synthesized from the polyhydrido copper cluster [Cu20H11{S2P­(O i Pr)2}9] with nine equivalents of terminal alkynes. Later, their isolated yields were significantly improved by direct synthesis from [Cu­(CH3CN)4]­(PF6), [NH4]­[S2P­(O i Pr)2], NaBH4, and alkynes along with NEt3 in THF. 1, 2, and 3 were fully characterized by single-crystal X-ray diffraction, ESI-MS, and multinuclear NMR spectroscopy. All three clustershave 11 copper atoms, adopting 3,3,4,4,4-pentacapped trigonal prismatic geometry, with two hydrides inside the Cu11 cage, the position of which was ascertained by a single-crystal neutron diffraction structure of cluster 1 co-crystallized with a [Cu7(H)­{S2P­(O i Pr)2}6] (4) cluster. Six dithiophosphate and three alkynyl ligands stabilize the Cu11H2 core in which the two hydrides adopt a trigonal pyramidal coordination mode. This coordination mode is so far unprecedented for hydride. The 1H NMR resonance frequency of the two hydrides appears at 4.8 ppm, a value further confirmed by 2H NMR spectroscopy for their deuteride derivatives [Cu11(D)2{S2P­(O i Pr)2}6(CCR)3]. A DFT investigation allows understanding the bonding within this new type of copper­(I) hydrides.