ChemInform Abstract: Transition Metal Phosphido Complexes. Part 9. P-Functional Heterocyclic Manganese Phosphorus Four- and Six-Membered Ring Complexes.

1986 ◽  
Vol 17 (13) ◽  
Author(s):  
H. SCHAEFER ◽  
J. ZIPFEL ◽  
B. GUTEKUNST ◽  
U. LEMMERT
Keyword(s):  
Transition Metal ◽  
Membered Ring ◽  
Ring Complexes

Multiple bonds between lead atoms and short bonds between transition metals

2012 ◽  
Vol 85 (4) ◽  
pp. 649-659 ◽  
Author(s):  
Shigeru Nagase
Keyword(s):  
Double Bond ◽  
Transition Metal ◽  
Transition Metals ◽  
Triple Bond ◽  
Membered Ring ◽  
Heterocyclic Carbenes ◽  
Multiple Bonds ◽  
Ring Complexes

The heaviest analogues of alkynes are investigated to realize a short triple bond between Pb atoms. For a short double bond between Pb atoms, the Pb2 molecule stabilized by dative N-heterocyclic carbenes is investigated. For unsupported and supported short bonds between transition metals, two-coordinate transition-metal and bicyclic four-membered ring complexes are investigated.

Übergangsmetallphosphidokomplexe, III [1] Neuartige Nickel-Phosphor-Drei-und Vierringkomplexe / Transition Metal Phosphido Complexes, III [1] Novel Nickel Phosphorus Three-, and Four-Membered Ring Complexes

1979 ◽  
Vol 34 (10) ◽  
pp. 1358-1361 ◽  
Author(s):  
Hans Schäfer
Keyword(s):  
Transition Metal ◽  
Ring System ◽  
Membered Ring ◽  
Complex Reaction ◽  
Reaction Sequence ◽  
Nmr Data ◽  
Ring Complexes

Abstract (R3P)2NiCl2 and LiP(SiMe3)2 react in a complex reaction sequence finally yielding (R3P)2Ni(PSiMe3)2 (5), containing a three-membered PNiP ring system, and [R3PNiP(SiMe3)2]2 (6), containing a (PNi)2 four-membered ring system with a nickel-nickel bond, respectively. NMR data are reported.

scholarly journals Carbonylniobium Chemistry, IV Derivatives of η5 -C5H5Nb(CO)4 with Tridentate Phosphines

1983 ◽  
Vol 38 (4) ◽  
pp. 446-448 ◽  
Author(s):  
Martin Hoch ◽  
Dieter Rehder
Keyword(s):  
Nmr Spectra ◽  
Membered Ring ◽  
Vanadium Complexes ◽  
Ring Complexes ◽  
Derivatives Of ◽  
Induced Reaction

Abstract The photo-induced reaction between CpNb(CO)4 and Ph2P(CH2)2PR(CH2)2PPh2 (L; R = Ph, Cy) yields the chelated five-membered ring complexes cis-[CpNb(CO)2L] (two isomers in the case of R = Cy). The uncordinated PPh2 group reacts with CpNb(CO)3THF to form CpNb(CO)2(μ-L)CpNb(CO)3. IR, 31P and 93Nb NMR spectra are discussed and compared with corresponding data of the analogous vanadium complexes.

scholarly journals Photochemische Reaktionen von Übergangsmetall-Olefin-Komplexen, V [1]. Die Umsetzung von Tricarbonyl-η-6.6-dimethylfulven-chrom(0) mit 7-Methyl- und 7-Methoxycycloheptatrien / Photochemical Reactions of Transition Metal Olefin Complexes, V [1]. The Reactions of Tricarbonyl-η-6,6-dimethylfulvene-chromium(0) with 7-Methyl- and 7-Methoxycycloheptatriene

1982 ◽  
Vol 37 (10) ◽  
pp. 1322-1326 ◽  
Author(s):  
Cornelius G. Kreiter ◽  
Hans Kurz
Keyword(s):  
Nmr Spectroscopy ◽  
Transition Metal ◽  
Column Chromatography ◽  
Room Temperature ◽  
Photochemical Reactions ◽  
Membered Ring ◽  
Reaction Products ◽  
Methyl Group

Abstract The stereochemistry of the photo reaction products of tricarbonyl-η-6,6-dimethyl-fulvene-chromium(O) (1) with 7-methyl-and 7-methoxycycloheptatriene was studied by NMR-spectroscopy. Both trienes add to 1, displace a CO ligand, and form substituted dicarbonyl-η3-2-cycloheptadienylene-η5-2-cyclopentadienylidene-propane-chromium(0) complexes. With C7H7CH3 only one isomer (3) is formed with the methyl-group in endo-position and the enyl system encompassing C(1′)-C(3′) of the seven membered ring. C7H7OCH3 yields 3 isomers which were separated by column chromatography. 5 has the same constitution as 3. The isomers 4 and 5 bear the OCH3-group in e^o-position. The enyl system of 4 is located on C(1′)-C(3′), that of 6 on C(3′)-C(5′). 6 rearranges at room temperature to 4.

scholarly journals Synthesis, structure, and chemistry of selenium-containing four-membered rings

2005 ◽  
Vol 77 (12) ◽  
pp. 2029-2032 ◽  
Author(s):  
Eric Block ◽  
Evgeny V. Dikarev ◽  
Jin Jin ◽  
Bo Li ◽  
Marina A. Petrukhina ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Membered Ring ◽  
Selenium Compounds ◽  
X Ray ◽  
Rigid Rod ◽  
First Time

Recent chemistry of four-membered ring selenium compounds is reviewed followed by a summary of work in our laboratories in this area. 2-Thia-6-selenaspiro[3.3]heptane has been synthesized for the first time. X-ray structures for the latter compound as well as for 2,6-dithiaspiro[3.3]heptane and 2,6-diselenaspiro[3.3]heptane have been determined. These compounds are useful as "rigid-rod" ligands for coordination to transition-metal complexes.

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