scholarly journals Single crystal structures and theoretical calculations of uranium endohedral metallofullerenes (U@C2n, 2n = 74, 82) show cage isomer dependent oxidation states for U

2017 ◽  
Vol 8 (8) ◽  
pp. 5282-5290 ◽  
Author(s):  
Wenting Cai ◽  
Roser Morales-Martínez ◽  
Xingxing Zhang ◽  
Daniel Najera ◽  
Elkin L. Romero ◽  
...  
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Oxidation State ◽  
Theoretical Calculations ◽  
State Dependence ◽  
Oxidation States ◽  
Metal Oxidation ◽  
X Ray ◽  
Endohedral Metallofullerenes ◽  
Single Crystal Structures

First X-ray structures and metal oxidation state dependence on cage isomerism for U-EMFs.

Synthesis, characterization and reactivity of trans-dihydroxy platinum(IV) porphyrins

2016 ◽  
Vol 20 (07) ◽  
pp. 785-792 ◽  
Author(s):  
Yingying Ning ◽  
Yi Yu ◽  
Yi-Wei Liu ◽  
Jing Zhang ◽  
Hao-Ling Sun ◽  
...  
Keyword(s):  
Oxygen Atom ◽  
Single Crystal ◽  
Crystal Structures ◽  
Oxidation State ◽  
Photoelectron Spectroscopy ◽  
Catalytic Reactions ◽  
X Ray ◽  
Single Crystal Structures

Synthesis of two trans-dihydroxy platinum(IV) porphyrins (TPP, tetraphenylporphyrin and F[Formula: see text]TPP, tetrakispentafluorophenylporphyrin) by dimethyl dioxirane (DMD) oxidation of their Pt[Formula: see text] porphyrin precursors have been described. The oxidation state of Pt cation in such complexes was assessed by X-ray photoelectron spectroscopy and shown to be [Formula: see text]4. More importantly, proton was found to promote the formation and stabilization of the trans-dihydroxy platinum(IV) porphyrins, as revealed by UV-vis spectroscopic results and single crystal structures. In addition, these trans-dihydroxy Pt[Formula: see text] porphyrins were much easier to be reduced than their Pt(II) counterparts and capable to transfer oxygen atom to triphenylphosphine and thioanisol, which is important for further application of Pt(IV) complexes in catalytic reactions.

Coordination Chemistry of Diselenophosphinate Complexes:  The X-ray Single-Crystal Structures of [K(Se2PPh2)(THF)2]2and [In(Se2PPh2)3]·L (L = THF, PhMe)

2004 ◽  
Vol 43 (16) ◽  
pp. 4802-4804 ◽  
Author(s):  
Robert P. Davies ◽  
Claire V. Francis ◽  
Andrew P. S. Jurd ◽  
M. Giovanna Martinelli ◽  
Andrew J. P. White ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Single Crystal ◽  
Crystal Structures ◽  
X Ray ◽  
Single Crystal Structures

Organolanthanoids. XXI Synthesis of Bis- and Tris-(diphenylphosphinocyclopenta- dienyl)lanthanoid Compounds and the X-Ray Crystal Structures of [Ln(C5H4PPh2)3(OPPh3)]·(thf)1

1997 ◽  
Vol 50 (10) ◽  
pp. 959 ◽  
Author(s):  
Glen B. Deacon ◽  
Craig M. Forsyth ◽  
Bryan M. Gatehouse ◽  
Anna Philosof ◽  
Brian W. Skelton ◽  
...  
Keyword(s):  
Oxygen Atom ◽  
Single Crystal ◽  
Crystal Structures ◽  
Room Temperature ◽  
Central Metal ◽  
Metal Oxidation ◽  
X Ray

Redox transmetallation ofTl(C5H4PPh2)with an excess of Sm in refluxing thf (thf = tetrahydrofuran) or Eu indme (dme = 1,2-dimethoxyethane) at room temperature gave thelanthanoid(II) compounds[Sm(C5H4PPh2)2](1) and[Eu(C5H4PPh2)2(dme)](2). Crystallization of (1) or[Yb(C5H4PPh2)2(dme)]with OPPh3 in dme yielded[Sm(C5H4PPh2)2(OPPh3)2](3) and[Yb(C5H4PPh2)2(OPPh3)2](4). Room-temperature transmetallation ofTl(C5H4PPh2)with Nd gave the lanthanoid(III) compound[Nd(C5H4PPh2)3(thf)](5), but analogous reactions with La, Pr, Er, Gd and Y in refluxing thfgenerally gave intractable oils, although in one instance impure[La(C5H4PPh2)3(thf)]·(thf)0 · 5,namely(6)·(thf)0 · 5, wasisolated. This complex was also obtained at room temperature by usingLaI3-activated La metal. Oxidation of (1) with 1 equiv.ofTl(C5H4PPh2)in toluene yielded solvent-freeSm(C5H4PPh2)3(7). Addition of OPPh3 to these systems allowed theisolation of[Ln(C5H4PPh2)3(OPPh3)]·(thf)x(x = 0-1 · 5; Ln = La (8), Pr (9),Nd (10), Sm (11), Er (12), Y (13)). Single-crystal X-ray structuredetermination of(10)·(thf)1 · 5,(11)·(thf)1 · 5 and(12)·(thf)1 · 5revealed formally 10-coordinate complexes with an O-bondedOPPh3, threeη5-C5H4PPh2ligands and lattice thf. The centroids of the C5 ringsand the oxygen atom surround the central metal in a distorted tetrahedralarray.

scholarly journals Hydrogels formed from Fmoc amino acids

CrystEngComm ◽  
2015 ◽  
Vol 17 (42) ◽  
pp. 8047-8057 ◽  
Author(s):  
Emily R. Draper ◽  
Kyle L. Morris ◽  
Marc A. Little ◽  
Jaclyn Raeburn ◽  
Catherine Colquhoun ◽  
...  
Keyword(s):  
Amino Acids ◽  
Molecular Weight ◽  
Single Crystal ◽  
Crystal Structures ◽  
Diffraction Data ◽  
Low Molecular Weight ◽  
X Ray Diffraction ◽  
X Ray ◽  
Single Crystal Structures

A number of Fmoc amino acids can be effective low molecular weight hydrogelators; we compare single crystal structures to fibre X-ray diffraction data.

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