ChemInform Abstract: Oxidative and Cluster Aufbau Reactions of nido-6-Metalladecaboranes Induced by Lewis Bases such as SMe2: High-Yield Formation of (1-(η6-C6Me6)-isocloso-1-RuB9H9) and the Molecular Structure of the Rh-commmo-(isonido-eleven-vertex)-(cl

ChemInform ◽  
1990 ◽  
Vol 21 (11) ◽  
Author(s):  
E. J. DITZEL ◽  
X. L. R. FONTAINE ◽  
N. N. GREENWOOD ◽  
J. D. KENNEDY ◽  
M. THORNTON-PETT
Keyword(s):  
Molecular Structure ◽  
High Yield ◽  
Lewis Bases ◽  
Yield Formation

Ten-Vertex Polyhedral Monocarbaborane Chemistry. The Novel High-Yield Formation of the Ten-Vertex closo Compound [6-(PMe2Ph)-closo-1-CB9H9] from the Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11]

1993 ◽  
Vol 58 (12) ◽  
pp. 2924-2935 ◽  
Author(s):  
Jane H. Jones ◽  
Bohumil Štíbr ◽  
John D. Kennedy ◽  
Mark Thornton-Pett
Keyword(s):  
Nmr Spectroscopy ◽  
Diffraction Analysis ◽  
High Yield ◽  
Monoclinic Space Group ◽  
The Novel ◽  
X Ray Diffraction ◽  
Metal Centre ◽  
X Ray ◽  
Yield Formation ◽  
Boiling Toluene

Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11] in boiling toluene solution results in an elimination of the platinum centre and cluster closure to give the ten-vertex closo species [6-(PMe2Ph)-closo-1-CB9H9] in 85% yield as a colourles air stable solid. The product is characterized by NMR spectroscopy and single-crystal X-ray diffraction analysis. Crystals (from hexane-dichloromethane) are monoclinic, space group P21/c, with a = 903.20(9), b = 1 481.86(11), c = 2 320.0(2) pm, β = 97.860(7)° and Z = 8, and the structure has been refined to R(Rw) = 0.045(0.051) for 3 281 observed reflections with Fo > 2.0σ(Fo). The clean high-yield elimination of a metal centre from a polyhedral metallaborane or metallaheteroborane species is very rare.

Crystal and molecular structure of trans-[RhCl(CO)(PtBu2Ph)2]

2018 ◽  
Vol 73 (12) ◽  
pp. 1029-1032
Author(s):  
Peter Mayer ◽  
Hans-Christian Böttcher
Keyword(s):  
Molecular Structure ◽  
Ir Spectroscopy ◽  
Crystal And Molecular Structure ◽  
Title Complex ◽  
High Yield ◽  
X Ray ◽  
Carbonyl Ligands ◽  
Pale Yellow ◽  
X Ray Crystallography ◽  
Type Complex

AbstractTreatment of THF solutions containing the rhodium(II) complex trans-[RhCl2(PtBu2Ph)2] (1) with [Fe2(CO)9] in the same solvent resulted in the formation of the Vaska-type complex trans-[RhCl(CO)(PtBu2Ph)2] (2) in high yield. The title complex 2 was obtained as pale yellow crystals, characterized by NMR and IR spectroscopy, as well as by microanalyses. Additionally, the molecular structure of 2 has been established by X-ray crystallography. As often reported for similar constituted compounds, the chlorido and carbonyl ligands in crystals of 2 are strongly disordered.

scholarly journals Photosynthetic activity of selected genotypes of hops (Humulus lupulus L.) in critical periods for yield formation

2011 ◽  
Vol 57 (No. 6) ◽  
pp. 264-270 ◽  
Author(s):  
J. Pokorný ◽  
J. Pulkrábek ◽  
P. Štranc ◽  
D. Bečka
Keyword(s):  
Photosynthetic Activity ◽  
Photosynthesis Rate ◽  
High Yield ◽  
Critical Periods ◽  
Maturity Level ◽  
Flowering Stage ◽  
Humulus Lupulus L ◽  
Similar Chemical ◽  
New Varieties ◽  
Yield Formation

This paper evaluates the influence of genotype on the photosynthetic activity of hops in the period critical for generating yield. Results over three years from measuring the photosynthesis rate statistically show an increase in the photosynthetic activity of hop plants in the flowering stage. The average photosynthetic rates from measurements on the second date (BBA 65) in the years 2007, 2008, and 2009 increased by 17.9%, 45.6%, and 49.2%, respectively. Different photosynthesis curve trends during the final stage of ontogenesis of the plants indicate the maturity level of each hop genotype. As regards the genotypes for which photosynthesis did not reduce significantly, it may be assumed that such plants had not reached technical maturity. The results from the three-year study also show that any promising genotype, with respect to the photosynthesis rate and yield, is the result of breeding of new varieties with greater resistance to drought and high temperatures. Very good results in photosynthetic activity were reached by the new varieties exhibiting high yield and a similar chemical composition to Saaz hop and those sharing the same origins to Saaz, showing a higher content of bitter substances. In 2008 and 2009, all three new forms reached yield levels of 2.35 to 3.12 t/ha of dry hops.

ChemInform Abstract: Acylation of Pyridine Rings Mediated by Group 4 Metal Aryl Oxide Compounds: High Yield Formation of α,α′-Disubstituted-2,6-pyridinedimethoxide Ligands.

ChemInform ◽  
1990 ◽  
Vol 21 (51) ◽  
Author(s):  
C. H. ZAMBRANO ◽  
A. K. MCMULLEN ◽  
L. M. KOBRIGER ◽  
P. E. FANWICK ◽  
I. P. ROTHWELL
Keyword(s):  
High Yield ◽  
Group 4 ◽  
Yield Formation ◽  
Group 4 Metal

HIGH-YIELD FORMATION OF ALLYLIC GERMANES BY Pd2(dba)3-CATALYZED REACTION OF ALLYLIC HALIDES WITH DIGERMANES

2001 ◽  
Vol 24 (2) ◽  
Author(s):  
Taichi Nakano ◽  
Sigeyuki Nöda ◽  
Nao-aki A-ihara ◽  
Hirohide Yamashita ◽  
Takashi Miyamoto ◽  
...  
Keyword(s):  
High Yield ◽  
Yield Formation ◽  
Allylic Halides

The direct electrochemical synthesis of thiolato complexes of copper, silver, and gold; the molecular structure of [Cu(SC6H4CH3-o)(1,10-phenanthroline)]2•CH3CN

1987 ◽  
Vol 65 (6) ◽  
pp. 1336-1342 ◽  
Author(s):  
Raj K. Chadha ◽  
Rajesh Kumar ◽  
Dennis G. Tuck
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Aqueous Solutions ◽  
Electrochemical Oxidation ◽  
Copper Atom ◽  
Electrochemical Synthesis ◽  
High Yield ◽  
Space Group ◽  
Anodic Copper

The electrochemical oxidation of anodic copper or silver (= M) into non-aqueous solutions of RSH (R = alkyl, axyl) gives MISR as insoluble materials in high yield. In the presence of 1,10-phenanthroline (= L), the products are MISR•phen for M = Cu, but not Ag. Gold resists oxidation under such conditions, and AuISR (R = n-C4H9, C6H5) was obtained in only poor yield. The crystal structure of the solvated dimeric adduct [Cu(SC6H4CH3-o)•phen]2•CH3CN is triclinic, with a = 10.682(3) Å, b = 11.729(4) Å, c = 15.608(5) Å, α = 76.87(2)°, β = 76.35(2)°, γ = 68.07(2)°, V = 1742(1) Å3, Z = 2 and space group [Formula: see text]. The structure is based on a folded Cu2S2 ring with an unusually short Cu—Cu distance of 2.613(3) Å Each copper atom has CuS2N2 pseudo-tetrahedral stereochemistry, with Cu—S = 2.337 Å(av) and Cu—N = 2.10 Å(av).

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