Cluster-Linking Reactions: Synthesis and Structure of the Dicluster Complex [(Ph3P)2N]{Fe3(CO)9(.mu.3-PMe)(.mu.3-P)}2Au] and the Definitive 31P NMR Spectroscopic Characterization of Tricluster and Tetracluster Complexes in Oligomer Mixtures

1994 ◽  
Vol 116 (5) ◽  
pp. 2143-2144 ◽  
Author(s):  
Maria T. Bautista ◽  
Peter S. White ◽  
Cynthia K. Schauer
Keyword(s):  
31P Nmr ◽  
Spectroscopic Characterization

scholarly journals Synthesis and Spectroscopic Characterization of Two New Dawson Sandwich Complexes: Na18[(NaOH)2(VO)2(P2W15O56)2].40H2O and Na18[(NaOH)2(VO)2(As2W15O56)2].27H2O

2012 ◽  
Vol 9 (4) ◽  
pp. 2185-2190 ◽  
Author(s):  
Mohammad Hakimi ◽  
Mohammad Reza Mohammadi ◽  
Salma Behboupour
Keyword(s):  
Divalent Cation ◽  
31P Nmr ◽  
Spectroscopic Characterization ◽  
Sandwich Complexes ◽  
Sandwich Complex ◽  
Sodium Salts ◽  
Vis Spectroscopy ◽  
Sandwich Type ◽  
Anion Complexes

Reaction of the three vacant complex ofa-[P2W15O56]12-anda-[As2W15O56]12-with divalent cation of VO2+in 1:1 mole ratio yields a previously unknown sandwich-type Wells-Dawson complex; Na18[(NaOH)2(VO)2(P2W15O56)2].40H2O (represented as Na2(VO)2P4W30) and Na18[(NaOH)2(VO)2(As2W15O56)2].27H2O (represented as Na2(VO)2As4W30). These complexes contain anions in which two divalent VO2+cations with two Na+ions are symmetrically sandwiched between two α-[P2W15O56]12- or α-[As2W15O56]12-groups leading to a “lacunary” sandwich complex. The anion complexes are isolated as sodium salts and characterized by elemental analysis, TGA, IR, 31P NMR and UV-Vis spectroscopy.

scholarly journals Spectroscopic characterization of nanoErythrosomes in the absence and presence of conjugated polyethyleneglycols: an FTIR and 31P-NMR study

2002 ◽  
Vol 1564 (2) ◽  
pp. 317-324 ◽  
Author(s):  
Roxane Pouliot ◽  
Audrey Saint-Laurent ◽  
Camille Chypre ◽  
Ritchie Audet ◽  
Isabelle Vitté-Mony ◽  
...  
Keyword(s):  
31P Nmr ◽  
Spectroscopic Characterization ◽  
Nmr Study

Infrared, 57Fe Mössbauer, and 31P NMR Spectroscopic Characterization of Fe(CO)4L (L = Phosphine and Phosphite)

1987 ◽  
Vol 42 (5) ◽  
pp. 573-578 ◽  
Author(s):  
Hidenari Inoue ◽  
Takashi Nakagome ◽  
Takeshi Kuroiwa ◽  
Tsuneo Shirai ◽  
Ekkehard Fluck
Keyword(s):  
31P Nmr ◽  
Chemical Shifts ◽  
Spectroscopic Characterization ◽  
Negative Slope ◽  
Positive Slope ◽  
Carbonyl Ligands ◽  
Trigonal Bipyramidal ◽  
Back Donation ◽  
Donor Capability

A series of trigonal bipyramidal Fe(CO)4L complexes has been prepared and characterized by infrared, 57Fe Mössbauer and 31P NMR spectroscopy. A linear correlation, with a negative slope, between the CO stretching frequencies and the isomer shifts demonstrates that the triple bond nature of the carbonyl ligands is strengthened with increasing iron-to-phosphorus back donation. The linear dependence of the quadrupole splittings on the isomer shifts with a positive slope has revealed that the σ-donor capability of the phosphine or phosphite ligand is offset by the π-acceptor capability. The formation of Fe(CO)4L complexes from the corresponding free ligands is accompanied by a downfield shift of 31P NMR chemical shifts. The coordination shifts are linearly correlated with the Mössbauer isomer shifts.

Spectroscopic Characterization of Bacteriorhodopsin's L-intermediate in 3D Crystals Cooled to 170 K¶

2001 ◽  
Vol 74 (6) ◽  
pp. 794 ◽  
Author(s):  
Antoine Royant ◽  
Karl Edman ◽  
Thomas Ursby ◽  
Eva Pebay-Peyroula ◽  
Ehud. M. Landau ◽  
...  
Keyword(s):  
Spectroscopic Characterization
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