A new synthetic route to quadruply bonded tungsten-tungsten and molybdenum-tungsten compounds of the type MM'X4(PR3)4, X = Cl or Br. Structural characterization of quadruply bonded WWBr4(.mu.-dppm)2 and MoWBr4(PMe2Ph)4 and phosphorus-31{proton} NMR spectra of these and related compounds

1993 ◽  
Vol 32 (5) ◽  
pp. 681-686 ◽  
Author(s):  
F. A. Cotton ◽  
Judith L. Eglin ◽  
Chris A. James

1999 ◽  
Vol 103 (47) ◽  
pp. 10356-10364 ◽  
Author(s):  
F. Angeli ◽  
T. Charpentier ◽  
P. Faucon ◽  
J.-C. Petit






2014 ◽  
Vol 62 (1) ◽  
pp. 59-63 ◽  
Author(s):  
Ing-Jy Tseng ◽  
Pen-Yuan Lin ◽  
Shiow-Yunn Sheu ◽  
Wan-Ni Tung ◽  
Ching-Tung Lin ◽  
...  
Keyword(s):  


Biochemistry ◽  
1990 ◽  
Vol 29 (18) ◽  
pp. 4466-4478 ◽  
Author(s):  
S. L. Heald ◽  
M. W. Harding ◽  
R. E. Handschumacher ◽  
I. M. Armitage




Biochemistry ◽  
1991 ◽  
Vol 30 (6) ◽  
pp. 1663-1672 ◽  
Author(s):  
Keith L. Constantine ◽  
Vasudevan Ramesh ◽  
Laszlo Banyai ◽  
Maria Trexler ◽  
Laszlo Patthy ◽  
...  




2006 ◽  
Vol 84 (6) ◽  
pp. 831-842
Author(s):  
Jeff D Clarke ◽  
Shasta L Moser ◽  
Keith Vaughan

A series of diazonium salts has been coupled to both secondary nitrogen atoms of the bis-secondary amine, N,N′-dimethyl-1,3-propanediamine (MeNHCH2CH2CH2NHMe), to afford the new bistriazene series, the 3-methyl-3-{3-[1-methyl-3-aryl-2-triazenyl]propyl}-1-aryl-1-triazenes (9). These compounds have been fully characterized by IR and NMR spectroscopy, with supporting data from elemental analysis and high-resolution mass spectrometry. A limited number of model compounds in the N,N-dimethyl-N-{3-[1-methyl-3-aryl-2-triazenyl]propyl}amine series (10) have been synthesized to aid in the interpretation of the NMR spectra of the bistriazenes (9). A series of related compounds, the 3-ethyl-3-{(E)-4-[1-ethyl-3-aryl-2-triazenyl]-2-butenyl}-1-aryl-1-triazenes (11), have been synthesized by diazonium coupling with the bis-secondary amine N,N′-diethyl-2-butene-1,4-diamine (15), and the diazonium coupling reaction with trans-N,N′-dimethycyclohexane-1,2-diamine (19) has been used to prepare another related series of bistriazenes, the 3-methyl-3-{2-[1-methyl-3-aryl-2-triazenyl]cyclohexyl}-1-aryl-1-triazenes (12). The 1H NMR spectra of these compounds are complex because of the presence of two chiral centres in the cyclohexanediamine moiety; the diastereotopic protons of the methylene groups in the cyclohexane ring are clearly distinguished in the 500 MHz spectra of these compounds.Key words: triazene, bistriazene, synthesis, nuclear magnetic resonance, propanediamine, 1,4-diamino-2-butene, cyclohexanediamine.



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