Determination of bond lengths in some compounds of rhenium from the x-ray LIII absorption discontinuity

Pramana ◽  
1973 ◽  
Vol 1 (2) ◽  
pp. 104-108 ◽  
Author(s):  
A V Pendharkar ◽  
Chintamani Mande
Keyword(s):  
X Ray ◽  
Bond Lengths

Intraionic Structure of HS04- and Alkali Cation Configuration in Molten NaHS04 and KHS04

1994 ◽  
Vol 49 (7-8) ◽  
pp. 785-789 ◽  
Author(s):  
K. Fukushima ◽  
M. Murofushi ◽  
M . Oki ◽  
K. Igarashi ◽  
J. Mochinaga ◽  
...  
Keyword(s):  
Molten Salts ◽  
Molecular Orbital Calculations ◽  
Distorted Tetrahedron ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bond Lengths ◽  
Semi Empirical ◽  
Polyatomic Anion ◽  
Short Range Structure

Abstract The short range structure of molten NaHSO4(I) and KHSO4(II) was estimated by X-ray diffraction. The polyatomic anion, HSO4-, in both molten salts was found to have a distorted tetrahedral structure in which the bond lengths of S-O and S-OH were 1.45 Å and 1.53 Å in (I) and 1.46 Å and 1.56 Å in (II), respectively. The coordination number of the Na+ or K+ around the HSO4- was evaluated to be about unity. The semi-empirical molecular orbital calculations by the MNDO-MOPAC method were applied to the determination of the intraionic structure of the H S 0 4 and the bond lengths of S-O and S -OH were computed to be 1.528 Å and 1.666 Å, respectively, supporting qualitatively that the HSO4- forms a rather distorted tetrahedron.

scholarly journals XAFS spectroscopy by an X-ray tube based spectrometer using a novel type of HOPG mosaic crystal and optimized image processing

2015 ◽  
Vol 30 (5) ◽  
pp. 1080-1085 ◽  
Author(s):  
C. Schlesiger ◽  
L. Anklamm ◽  
H. Stiel ◽  
W. Malzer ◽  
B. Kanngießer
Keyword(s):  
Image Processing ◽  
Chemical Species ◽  
X Ray ◽  
Xafs Spectroscopy ◽  
Bond Lengths ◽  
Mosaic Crystal

This paper presents a XAFS laboratory spectrometer with optimized image treatment suitable for determination of bond lengths and chemical species.

Synthesis and X-ray structure determination of the Ir–Ag–Ir donor–acceptor metal–metal bonded complex [{(η5-C5Me5)(CO)2Ir}2Ag][BF4]

1989 ◽  
Vol 67 (11) ◽  
pp. 1832-1836 ◽  
Author(s):  
Frederick W. B. Einstein ◽  
Richard H. Jones ◽  
Xiaoheng Zhang ◽  
Derek Sutton
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Title Complex ◽  
Monoclinic Space Group ◽  
X Ray ◽  
Bond Lengths ◽  
Metal Metal ◽  
Donor Acceptor ◽  
Silver Metal

The title complex (2) has been synthesized from the reaction of (η5-C5Me5)Ir(CO)2 (1) with AgBF4. Complex 2 crystallizes in the monoclinic space group P21/c with a = 12.355(2) Å, b = 13.713(2) Å, c = 16.672(3) Å, β = 97.70(1)°, and Z = 4. The structure was solved by using 3131 observed reflections (I ≥ 2.5σ(I)) in the range 0° < 2θ < 50° to final discrepancy indices of RF = 0.032 and RwF = 0.038. The cation may be described as consisting of two molecules of 1 bound to Ag+ by donor–acceptor Ir → Ag bonds. The Ir—Ag—Ir skeleton is nearly linear (angle 173.67(6)°). The Ag—Ir bond lengths are equal (2.659(1) Å), and the two molecules of 1 are disposed mutually trans, to give the cation approximate (noncrystallographic) C2h symmetry. Keywords: complex, iridium, silver, metal-metal bond, X-ray, crystal, structure, carbonyl, donor-acceptor, pentamethylcyclopentadienyl.

A Base-stabilized Iodoborylene Complex of Platinum(II)

2013 ◽  
Vol 68 (5-6) ◽  
pp. 747-749 ◽  
Author(s):  
Holger Braunschweig ◽  
Peter B. Brenner ◽  
Rian D. Dewhurst ◽  
Krzysztof Radacki
Keyword(s):  
Molecular Structure ◽  
Structure Determination ◽  
Title Compound ◽  
Platinum Complex ◽  
Phosphine Ligand ◽  
X Ray ◽  
Bond Lengths ◽  
Trans Influence ◽  
Neutral Base

The first base-stabilized iodoborylene platinum complex was prepared through the addition of 4-picoline (4-Pic) to a suspension of an iodo-bridged binuclear iodoboryl complex. An X-ray structure determination of the title compound has characterized the molecular structure as cis-[Pt{BI(4- Pic)}I2(PCy3)]. The bond lengths lie in the expected range for neutral, base-stabilized borylene complexes. The strong trans influence of the borylene moiety is reflected in the longer Pt-1 distance for the iodo ligand opposite the borylene, compared to that opposite the phosphine ligand

Metallkomplexe mit funktionalisierten Schwefelliganden, II . Ruthenium(II)-benzylthiosulfinato Komplexe. Kristallstrukturanalyse von Cp(Ph3P)2Ru[S—S(O)—CH2C6H5]/Metal Complexes of Functionalized Sulfur Containing Ligands, II. Synthesis of Ruthenium (II) B enzyl-thiosulphinato Complexes. X-Ray Structure Determination of Cp(Ph3P)2Ru[S—S(O)—CH2C6H5]

1992 ◽  
Vol 47 (1) ◽  
pp. 39-44 ◽  
Author(s):  
Wolfgang Weigand ◽  
Gabriele Bosl ◽  
Christian Robl
Keyword(s):  
Metal Complexes ◽  
Structure Determination ◽  
Spectroscopic Data ◽  
Chiral Complexes ◽  
X Ray ◽  
Bond Lengths ◽  
Independent Molecules ◽  
Sulfur Containing

(2))CpRu(PPh3)(L)(SH) (L = PPh3 (1), CO compounds react with N-(benzylsulphinyl) phthalim ides to give the chiral complexes CpRu(PPh3)(L)[S-S(O)-CH2-Ph] (4, 5). For 5, a diastereoselectivity of 10:3 is observed. The compounds 4, 5 have been characterized by their spectroscopic data. The X-ray structure d etermination of 4 shows sulphur-sulphur bond lengths of 204,4(4), 205,5(4) and 205,3(4) pm for three independent molecules.

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