Reactivity of cyclopalladated compounds. Part 17. Influence of the donor atom in metallacyclic rings on the insertion of tert-butyl isocyanide and carbon monoxide into their palladium-carbon bonds. X-ray molecular structure of cyclo-[Pd(.eta.-(CN)-.mu.-C(C6H4CH2SMe):NBu-tert)Br]2

1987 ◽  
Vol 6 (4) ◽  
pp. 899-901 ◽  
Author(s):  
Jairton. Dupont ◽  
Michel. Pfeffer ◽  
Jean Claude. Daran ◽  
Yves. Jeannin
Keyword(s):  
Molecular Structure ◽  
Carbon Monoxide ◽  
Donor Atom ◽  
X Ray ◽  
Tert Butyl ◽  
Carbon Bonds ◽  
Cyclopalladated Compounds

scholarly journals New Spiro-Tin Compounds: Reaction of N,N′-Dialkyl Sulfur Diimides with Cyclic Bis(amino)stannylenes - Unexpected Formation of a N-N Bond

1995 ◽  
Vol 50 (12) ◽  
pp. 1811-1817 ◽  
Author(s):  
Max Herberhold ◽  
Christian Köhler ◽  
Wolfgang Milius ◽  
Bernd Wrackmeyer
Keyword(s):  
Molecular Structure ◽  
Magnetic Resonance ◽  
Single Crystal ◽  
Structure Analysis ◽  
Membered Ring ◽  
Monoclinic Space Group ◽  
Unexpected Formation ◽  
Tin Compounds ◽  
X Ray ◽  
Tert Butyl

N,N′-Dialkyl sulfur diimides (1), R(NSN)R [R = Me (a), Et (b), nPr (c), nBu (d)] react with cyclic bis(amino)stannylenes such as 1,3-di-tert-butyl-4,4-dimethyl-1,3,4,2λ2-diazasilastannetedine (2) or 1,3-di-tert-butyl-4,4,5,5-tetramethyl-1,3,4,5,2λ2-diazadisilastannolidine (3) in a 2:1 ratio to give the new spiro-tin(IV) compounds 5a-d, 6b and 6c, built from the respective cyclic bis(amino)stannylene and a seven-membered ring in which the two sulfur diimide groups are coupled via a N-N bond and across the tin atom. A 1:1 adduct 4 is proposed as an intermediate which is the final product 4e in the case of R = tBu (1e). The products were characterized by multinuclear magnetic resonance (1H, 13C, 15N, 29Si, 119Sn NMR), and in the case of 5c the molecular structure was determined by single crystal X-ray structure analysis [monoclinic, space group C2/c ; a = 1504.1(3), b = 1393.3(3), c = 1688.6(3) pm; β = 115.71(3)°].

ChemInform Abstract: Dolastatins. Part 24. Synthesis of (-)-Dolastatin 10. X-Ray Molecular Structure of N,N-Dimethylvalyl-valyl-dolaisoleuine tert-Butyl Ester.

ChemInform ◽  
2010 ◽  
Vol 27 (33) ◽  
pp. no-no
Author(s):  
G. R. PETTIT ◽  
J. K. SRIRANGAM ◽  
S. B. SINGH ◽  
M. D. WILLIAMS ◽  
D. L. HERALD ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Butyl Ester ◽  
X Ray ◽  
Tert Butyl ◽  
Dolastatin 10

Behavior of 1,3-Di(tert-butyl)-2,4-bis(tetramethylpiperidino)-1,3,2,4-diphospha- diboretane towards Boron Halides and Adduct Formation of a Bicyclo[1.1.0]diphosphadiboretane with Tris(pentafluorophenyl)borane [1]

2006 ◽  
Vol 61 (3) ◽  
pp. 265-274 ◽  
Author(s):  
Klaus Knabel ◽  
Heinrich Nöth ◽  
Robert T. Paine
Keyword(s):  
Molecular Structure ◽  
Structure Analysis ◽  
Adduct Formation ◽  
Ring System ◽  
Lewis Acidity ◽  
X Ray ◽  
Tert Butyl ◽  
Boron Halides ◽  
System 2

AbstractWhile the diphosphadiboretane (tBuP=Btmp)2, 1, reacts with boron trihalides BX3 (X = Cl, Br, I) with BN cleavage producing a number of unidentifiable products, a new tricyclic BP ring system 2, containing B3P3, PB2C2 and C6 rings, results from the combination of PhBCl2 and 1. B-Chlorocatecholborane and 1 give access to the diborylphosphane 3, tmpBCl-PtBu-cat (cat = C6H4O2B). This shows that the selectivity of the reactions increases as the Lewis acidity of boron halide decreases. The structure of compounds 2 and 3 were determined by X-ray structure analysis. The bicyclic (tmpBP)2 4 forms no adducts with MeI, CF3SO2Me or Ph3C(SnCl5). However, it adds B(C6F5)3 to give 10, the first BX3 adduct of this bicycle that is fully characterized including its molecular structure.

Dolastatins 24: synthesis of (–)-dolastatin 10. X-Ray molecular structure of N,N-dimethylvalyl-valyl-dolaisoleuine tert-butyl ester

1996 ◽  
pp. 859-863 ◽  
Author(s):  
George R. Pettit ◽  
Jayaram K. Srirangam ◽  
Sheo Bux Singh ◽  
Michael D. Williams ◽  
Delbert L. Herald ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Butyl Ester ◽  
X Ray ◽  
Tert Butyl ◽  
Dolastatin 10

The molecular structure of 4-tert-butylpyrazoles in the solid state and in solution: an X-ray, NMR and calorimetric study of the buttressing effect of a 4-tert-butyl substituent

2001 ◽  
Vol 25 (6) ◽  
pp. 819-823 ◽  
Author(s):  
Swiatoslaw Trofimenko ◽  
Arnold L. Rheingold ◽  
Louise M. Liable-Sands ◽  
Rosa María Claramunt ◽  
Concepción López ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Solid State ◽  
Calorimetric Study ◽  
X Ray ◽  
Tert Butyl
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