scholarly journals Construction of heterometallic clusters with multiple uranium–metal bonds by using dianionic nitrogen–phosphorus ligands

2020 ◽  
Vol 11 (29) ◽  
pp. 7585-7592 ◽  
Author(s):  
Genfeng Feng ◽  
Karl N. McCabe ◽  
Shuao Wang ◽  
Laurent Maron ◽  
Congqing Zhu
Keyword(s):  
Transition Metals ◽  
Phosphorus Ligands ◽  
Heterometallic Clusters ◽  
Uranium Metal ◽  
Metal Bond ◽  
Metal Metal ◽  
Metal Bonds ◽  
Nitrogen Phosphorus

Compared with the prevalent metal–metal bond in transition metals, examples of the actinide–metal bond in heterometallic clusters are rare.

Reactivity of metal–metal bonds. IV. The reaction of sulfur dioxide with compounds containing Sn—Sn and Sn—Mn bonds

1968 ◽  
Vol 46 (4) ◽  
pp. 643-647 ◽  
Author(s):  
N. A. D. Carey ◽  
H. C. Clark
Keyword(s):  
Sulfur Dioxide ◽  
Metal Bond ◽  
Metal Metal ◽  
Metal Metal Bonds ◽  
New Compounds ◽  
Metal Bonds ◽  
Bimetallic Compounds

The reactions of sulfur dioxide with the compounds R6Sn2 and R3SnMn(CO)5 (R = CH3 or C6H5) have been studied. In all cases the evidence indicates that the metal–metal bond has been cleaved. With the ditins the new compounds R3Sn•SO2 (R = CH3 or C6H5) and R3Sn•2SO2 (R = C6H5) were obtained, while the mixed bimetallic compounds gave R3SnMn(CO)5•2.5SO2 (R = CH3 or C6H5) and R3SnMn(CO)5•1.5SO2 (R = CH3). The possible structures of these derivatives are discussed.

The He(I) and He(II) Photoelectron Spectra of Tm2Zn (Tm = (C5H5)Fe(CO)2, (C5H5)M(CO)3; M = Cr, Mo, W)

1984 ◽  
Vol 39 (9) ◽  
pp. 1206-1210
Author(s):  
Jaap N. Louwen ◽  
Derk J. Stufkens ◽  
Ad Oskam
Keyword(s):  
Electronic Structure ◽  
Transition Metals ◽  
Ionization Energy ◽  
Photoelectron Spectra ◽  
Metal Bond ◽  
Metal Metal

UV photoelectron spectra of the title compounds are reported. Assignments are made with the help of He(I)/He(II) intensity differences, shift effects upon substitution and comparison with related molecules. Previously drawn conclusions about the electronic structure of similar com­plexes also hold for the compounds. It is indicated that the ionization energy for the symmetric metal-metal bond strongly depends on the overlap between transition and post-transition metals.

scholarly journals Identification of a uranium–rhodium triple bond in a heterometallic cluster

2019 ◽  
Vol 116 (36) ◽  
pp. 17654-17658 ◽  
Author(s):  
Genfeng Feng ◽  
Mingxing Zhang ◽  
Penglong Wang ◽  
Shuao Wang ◽  
Laurent Maron ◽  
...  
Keyword(s):  
Triple Bond ◽  
Covalent Bond ◽  
Small Molecule Activation ◽  
X Ray Diffraction ◽  
Multiple Bonds ◽  
Uranium Metal ◽  
Heterometallic Cluster ◽  
Metal Metal ◽  
Metal Bonds

The chemistry of d-block metal–metal multiple bonds has been extensively investigated in the past 5 decades. However, the synthesis and characterization of species with f-block metal–metal multiple bonds are significantly more challenging and such species remain extremely rare. Here, we report the identification of a uranium–rhodium triple bond in a heterometallic cluster, which was synthesized under routine conditions. The uranium–rhodium triple-bond length of 2.31 Å in this cluster is only 3% longer than the sum of the covalent triple-bond radii of uranium and rhodium (2.24 Å). Computational studies reveal that the nature of this uranium–rhodium triple bond is 1 covalent bond with 2 rhodium-to-uranium dative bonds. This heterometallic cluster represents a species with f-block metal–metal triple bond structurally authenticated by X-ray diffraction. These studies not only demonstrate the authenticity of the uranium–metal triple bond, but also provide a possibility for the synthesis of other f-block metal–metal multiple bonds. We expect that this work may further our understanding of the bonding between uranium and transition metals, which may help to design new d-f heterometallic catalysts with uranium–metal bonds for small-molecule activation and to promote the utilization of abundant depleted uranium resources.

scholarly journals Malcolm Harold Chisholm. 15 October 1945 — 20 November 2015

2016 ◽  
Vol 63 ◽  
pp. 117-136
Author(s):  
Richard J. Puddephatt
Keyword(s):  
Organic Compounds ◽  
Bond Order ◽  
Functional Materials ◽  
Synthetic Chemistry ◽  
Great Pleasure ◽  
Metal Bond ◽  
Triple Bonds ◽  
Metal Metal ◽  
Metal Metal Bonds ◽  
Metal Bonds

Malcolm Chisholm was one of the most creative and distinguished inorganic chemists of his generation. He was particularly renowned for his chemistry of compounds containing multiple metal–metal bonds and for showing how they could give insights into catalysis or be used in functional materials. Very early in his independent career he reported the remarkable compounds M 2 X 6 , with M = molybdenum or tungsten and X = alkoxide or dialkylamide, which contain metal–metal triple bonds, and his group showed how they could activate organic compounds in unusual ways, often with changes in the metal–metal bond order. He was a master of synthetic chemistry, but he also made notable discoveries in theory, spectroscopy and catalysis. Personally, he was outgoing, friendly and fun-loving. He was faithful and supportive of his family, students, colleagues and his many friends around the globe, and took great pleasure in their successes.

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