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Title: Probing Fe–V Bonding in a C3-Symmetric Heterobimetallic Complex

Journal Article · · Inorganic Chemistry
ORCiD logo [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [2]
  1. Florida State Univ., Tallahassee, FL (United States); Ohio State University
  2. Florida State Univ., Tallahassee, FL (United States)
  3. Brandeis Univ., Waltham, MA (United States)
  4. Brandeis Univ., Waltham, MA (United States); The Ohio State Univ., Columbus, OH (United States)
  5. Florida State Univ., Tallahassee, FL (United States); Univ. of Idaho, Moscow, ID (United States)

Direct metal–metal bonding of two distinct first-row transition metals remains relatively unexplored compared to their second- and third-row heterobimetallic counterparts. Herein, a recently reported Fe–V triply bonded species, [V(iPrNPPh2)3FeI] (1; Kuppuswamy, S.; Powers, T. M.; Krogman, J. P.; Bezpalko, M. W.; Foxman, B. M.; Thomas, C. M. Vanadium–iron complexes featuring metal–metal multiple bonds. Chem. Sci.2013, 4, 3557–3565), is studied using high-frequency electron paramagnetic resonance, field- and temperature-dependent 57Fe nuclear gamma resonance (Mössbauer) spectroscopy, and high-field electron-electron double resonance detected nuclear magnetic resonance. From the use of this suite of physical methods, we have observed the electronic structure of 1. These studies allow us to establish the effective $$ \tilde{g} $$ tensors as well as the Fe/V electro-nuclear hyperfine interaction tensors of the spin S = 1/2 ground state. We have rationalized these tensors in the context of ligand field theory supported by quantum chemical calculations. This theoretical analysis suggests that the S = 1/2 ground state originates from a single unpaired electron predominately localized on the Fe site.

Research Organization:
Brandeis Univ., Waltham, MA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0014151
OSTI ID:
1524784
Journal Information:
Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 10 Vol. 57; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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