Chemistry of heterocyclic compounds. 109. Macrocyclic inclusion complexes. Synthesis, x-ray structural analysis and formation of mono- and dinuclear transition metal complexes of dipyridino crown ethers

1989 ◽  
Vol 54 (21) ◽  
pp. 5105-5110 ◽  
Author(s):  
George R. Newkome ◽  
Garry E. Keifer ◽  
Dalip K. Kohli ◽  
Yuan Jiao Xia ◽  
Frank R. Fronczek ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Transition Metal ◽  
Metal Complexes ◽  
Inclusion Complexes ◽  
Crown Ethers ◽  
Transition Metal Complexes ◽  
Heterocyclic Compounds ◽  
X Ray

Transition Metal Complexes of Diazenes, XL [1] Iron Carbonyl Assisted Formation of Bicyclic 1,2-Dihydropyrazol-3-ones from Pyrazolines and Alkynes

1997 ◽  
Vol 52 (8) ◽  
pp. 994-996 ◽  
Author(s):  
Horst Kisch
Keyword(s):  
Structural Analysis ◽  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Oxidative Degradation ◽  
Iron Complex ◽  
Iron Carbonyl ◽  
X Ray

The oxidative degradation of a tricyclic dicarbonyl iron complex substituted at the diazaferrole ring by ester groups ( 1b ) does not lead to a bicyclic 1,2,3-diazepinone derivative, as reported recently for the case of the phenyl substituted compound (1a ), but affords the bicyclic 4-stilbenyl-1,2-dihydropyrazol-3-one 2b as shown by X-ray structural analysis. Since 1b is obtained by reaction of two different alkynes with a hexacarbonyldiiron complex of the cyclic 1,2-diazene, the over-all reaction formally consists of the addition of CO and two alkyne molecules to an N = N function affording a vinyl substituted diazacyclopentenone ring, and may be viewed as a type of hetero Pauson-Khand reaction.

Preparation, properties and structure of some intermediate nido- and arachno-monocarbaboranes

1981 ◽  
Vol 46 (10) ◽  
pp. 2345-2353 ◽  
Author(s):  
Karel Baše ◽  
Bohumil Štíbr ◽  
Jiří Dolanský ◽  
Josef Duben
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Nmr Spectra ◽  
Liquid Ammonia ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr ◽  
Starting Compound

The 6-N(CH3)3-6-CB9H11 carbaborane reacts with sodium in liquid ammonia with the formation of 6-CB9H12- which was used as a starting compound for preparing the 4-CB8H14, 9-L-6-CB9H13 (L = (CH3)2S, CH3CN and P(C6H5)3), 1-(η5-C5H5)-1,2-FeCB9H10-, and 2,3-(η5-C5H5)2-2,31-Co2CB9H10- carboranes. The 4-CB8H14 compound was dehydrogenated at 623 K to give 4-(7)-CB8H12 carborane. Base degradation of 6-N(CH3)3-6-CB9H11 in methanol resulted in the formation of 3,4-μ-N(CH3)3CH-B5H10. The structure of all compounds was proposed on the basis of their 11B and 1H NMR spectra and X-ray diffraction was used in the case of the transition metal complexes.

ChemInform Abstract: CHEMISTRY OF HETEROCYCLIC COMPOUNDS. 18. TRANSITION METAL COMPLEXES OF SELECTED 2-PYRIDYLACETYLENES

1976 ◽  
Vol 7 (11) ◽  
pp. no-no
Author(s):  
G. R. NEWKOME ◽  
G. L. MCCLURE ◽  
S. F. WATKINS ◽  
B. GAYLE ◽  
R. E. TAYLOR ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Heterocyclic Compounds
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