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Title: Synthesis, characterization, and reactivity of the first uranium metallocene 1,2 bis(diphenylphosphino)acetylene complexes.

Two new uranium metallacyclopropenes, (C 5Me 4R) 2U(η 2-Ph 2PC=CPPh 2) (R = Me, Et) were prepared by reducing the corresponding (C 5Me 4R) 2UCl 2 complexes with KC 8 in the presence of 1,2-bis(diphenylphosphino)acetylene (Ph 2P–C≡C–PPh 2). Both compounds were fully characterized by a combination of elemental analysis and multinuclear NMR, UV–visible–NIR, and IR spectroscopies. Differences in the electronic spectra of these novel compounds and the known (C 5Me 5) 2U(η 2-Me 3SiC=CSiMe 3) are discussed. Finally, also presented is the solid-state structure of (C 5Me 4Et) 2U(η 2-Ph 2PC=CPPh 2), which reveals significant distortions of the coordinated 1,2-bis(diphenylphosphino)acetylene (Ph 2P–C≡C–PPh 2) ligand.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-17-31363
Journal ID: ISSN 0020-1693
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Inorganica Chimica Acta
Additional Journal Information:
Journal Volume: 482; Journal ID: ISSN 0020-1693
Publisher:
Elsevier
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Uranium; Phosphorous; Metallacyclopropene; Electronic Spectroscopy; X-ray Crystallography
OSTI Identifier:
1454999

Pagano, Justin Kane, Scott, Brian Lindley, and Kiplinger, Jaqueline Loetsch. Synthesis, characterization, and reactivity of the first uranium metallocene 1,2 bis(diphenylphosphino)acetylene complexes.. United States: N. p., Web. doi:10.1016/j.ica.2018.06.010.
Pagano, Justin Kane, Scott, Brian Lindley, & Kiplinger, Jaqueline Loetsch. Synthesis, characterization, and reactivity of the first uranium metallocene 1,2 bis(diphenylphosphino)acetylene complexes.. United States. doi:10.1016/j.ica.2018.06.010.
Pagano, Justin Kane, Scott, Brian Lindley, and Kiplinger, Jaqueline Loetsch. 2018. "Synthesis, characterization, and reactivity of the first uranium metallocene 1,2 bis(diphenylphosphino)acetylene complexes.". United States. doi:10.1016/j.ica.2018.06.010.
@article{osti_1454999,
title = {Synthesis, characterization, and reactivity of the first uranium metallocene 1,2 bis(diphenylphosphino)acetylene complexes.},
author = {Pagano, Justin Kane and Scott, Brian Lindley and Kiplinger, Jaqueline Loetsch},
abstractNote = {Two new uranium metallacyclopropenes, (C5Me4R)2U(η2-Ph2PC=CPPh2) (R = Me, Et) were prepared by reducing the corresponding (C5Me4R)2UCl2 complexes with KC8 in the presence of 1,2-bis(diphenylphosphino)acetylene (Ph2P–C≡C–PPh2). Both compounds were fully characterized by a combination of elemental analysis and multinuclear NMR, UV–visible–NIR, and IR spectroscopies. Differences in the electronic spectra of these novel compounds and the known (C5Me5)2U(η2-Me3SiC=CSiMe3) are discussed. Finally, also presented is the solid-state structure of (C5Me4Et)2U(η2-Ph2PC=CPPh2), which reveals significant distortions of the coordinated 1,2-bis(diphenylphosphino)acetylene (Ph2P–C≡C–PPh2) ligand.},
doi = {10.1016/j.ica.2018.06.010},
journal = {Inorganica Chimica Acta},
number = ,
volume = 482,
place = {United States},
year = {2018},
month = {6}
}