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Title: Uncovering Multiple Metal-Metal Bonding in a Tetranuclear Fluoride Rhenium Cluster or the Curious Case of {[Ni(H2O)6](NH4)4}[Re4F18]·4H2O

Journal Article · · European Journal of Inorganic Chemistry
 [1];  [1];  [2];  [3];  [2];  [4]; ORCiD logo [1]
  1. Univ. of Nevada, Las Vegas, NV (United States)
  2. Freie Univ. Berlin (Germany)
  3. Technical Univ. of Munich, Garching (Germany). Catalysis Research Center
  4. Argonne National Lab. (ANL), Lemont, IL (United States)

The compound {[Ni(H2O)6](NH4)4}[Re4F18]·4H2O (1) has been isolated and characterized by single-crystal X-ray diffraction, Raman spectroscopy and computational methods. The compound 1 crystallizes in the triclinic space group P1 (a = 6.6620(9) Å, b = 9.7121(13) Å, c = 11.2007(15) Å, α = 67.644(2)°, β = 83.827(2)°, γ = 84.366(2)°). In 1, the [Re4F18]6– anion is composed of four Re(III) atoms bridged by two µ-bridging fluorine atoms and two di-µ-bridging fluorine atoms. Furthermore, in [Re4F18]6–, the shortest Re–Re distance (i.e., 2.3631(6) Å) is characteristic of the presence of a Re=Re double bond; the Re–F distances range from 1.854(6) to 2.008(5) Å. Theoretical calculations confirm the presence of a weak Re=Re double bond; the Mayer–Mulliken bond order of the doubly bridged Re atoms is 1.8097 and the natural localized molecular orbital bond order is 1.8751. The Raman spectrum of 1 has been measured and shows a series of bands in the region 167–1449 cm–1 that have been attributed to Re–F and Ni–O stretches, Re4F18 ring breathing and NH4+ bending and libration modes.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC02-06CH11357; NA0003180; NA0000979
OSTI ID:
1767149
Alternate ID(s):
OSTI ID: 1569775
Journal Information:
European Journal of Inorganic Chemistry, Vol. 2019, Issue 38; ISSN 1434-1948
Publisher:
ChemPubSoc EuropeCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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