Bis(aryldiazene) derivatives of iron(II): preparation, characterization, and properties of the first complexes containing two diazene ligands bonded to the same central metal. The x-ray crystal structures of hexacoordinate [FeH(4-CH3C6H4NNH)[P(OEt)3]4]+, and pentacoordinate [Fe(4-CH3C6H4N2)[P(OEt)3]4]+ cations

1986 ◽  
Vol 108 (21) ◽  
pp. 6627-6634 ◽  
Author(s):  
Gabriele. Albertin ◽  
Stefano. Antoniutti ◽  
Giancarlo. Pelizzi ◽  
Francesca. Vitali ◽  
Emilio. Bordignon
Keyword(s):  
Crystal Structures ◽  
Central Metal ◽  
X Ray ◽  
Derivatives Of

The Through-Bond Interaction of a Sulfur Lone Pair with Oxygenated Substituents in the Thiacyclohexane Framework

2005 ◽  
Vol 58 (7) ◽  
pp. 531
Author(s):  
Laura Andrau ◽  
Jonathan M. White
Keyword(s):  
Low Temperature ◽  
Crystal Structures ◽  
Bond Distance ◽  
Lone Pair ◽  
X Ray ◽  
Ester Derivative ◽  
Bond Interaction ◽  
Derivatives Of ◽  
Electron Demand

Low-temperature X-ray crystal structures were determined on a range of derivatives of 4-thiacyclohexanol 5a of varying electron demand with a view to finding evidence for a through-bond interaction between the sulfur lone pair and the oxygenated substituent. In contrast to earlier suggestions, plots of C–OR bond distance versus pKa (ROH) showed that any interaction between the sulfur and the OR group is unlikely to be of a through-bond origin. Furthermore, unimolecular solvolysis rate measurements on the nosylate ester derivative 5g showed that the sulfur actually retards the reaction slightly in comparison with the corresponding sulfur-free analogue 6.

Methyl Tin(IV) Derivatives of HOTeF5and HN(SO2CF3)2:  A Solution Multinuclear NMR Study and the X-ray Crystal Structures of (CH3)2SnCl(OTeF5) and [(CH3)3Sn(H2O)2][N(SO2CF3)2]†

2004 ◽  
Vol 43 (10) ◽  
pp. 3189-3199 ◽  
Author(s):  
Ashwani Vij ◽  
William W. Wilson ◽  
Vandana Vij ◽  
Robert C. Corley ◽  
Fook S. Tham ◽  
...  
Keyword(s):  
Crystal Structures ◽  
X Ray ◽  
Multinuclear Nmr ◽  
Nmr Study ◽  
Derivatives Of

Organolanthanoids. XXI Synthesis of Bis- and Tris-(diphenylphosphinocyclopenta- dienyl)lanthanoid Compounds and the X-Ray Crystal Structures of [Ln(C5H4PPh2)3(OPPh3)]·(thf)1

1997 ◽  
Vol 50 (10) ◽  
pp. 959 ◽  
Author(s):  
Glen B. Deacon ◽  
Craig M. Forsyth ◽  
Bryan M. Gatehouse ◽  
Anna Philosof ◽  
Brian W. Skelton ◽  
...  
Keyword(s):  
Oxygen Atom ◽  
Single Crystal ◽  
Crystal Structures ◽  
Room Temperature ◽  
Central Metal ◽  
Metal Oxidation ◽  
X Ray

Redox transmetallation ofTl(C5H4PPh2)with an excess of Sm in refluxing thf (thf = tetrahydrofuran) or Eu indme (dme = 1,2-dimethoxyethane) at room temperature gave thelanthanoid(II) compounds[Sm(C5H4PPh2)2](1) and[Eu(C5H4PPh2)2(dme)](2). Crystallization of (1) or[Yb(C5H4PPh2)2(dme)]with OPPh3 in dme yielded[Sm(C5H4PPh2)2(OPPh3)2](3) and[Yb(C5H4PPh2)2(OPPh3)2](4). Room-temperature transmetallation ofTl(C5H4PPh2)with Nd gave the lanthanoid(III) compound[Nd(C5H4PPh2)3(thf)](5), but analogous reactions with La, Pr, Er, Gd and Y in refluxing thfgenerally gave intractable oils, although in one instance impure[La(C5H4PPh2)3(thf)]·(thf)0 · 5,namely(6)·(thf)0 · 5, wasisolated. This complex was also obtained at room temperature by usingLaI3-activated La metal. Oxidation of (1) with 1 equiv.ofTl(C5H4PPh2)in toluene yielded solvent-freeSm(C5H4PPh2)3(7). Addition of OPPh3 to these systems allowed theisolation of[Ln(C5H4PPh2)3(OPPh3)]·(thf)x(x = 0-1 · 5; Ln = La (8), Pr (9),Nd (10), Sm (11), Er (12), Y (13)). Single-crystal X-ray structuredetermination of(10)·(thf)1 · 5,(11)·(thf)1 · 5 and(12)·(thf)1 · 5revealed formally 10-coordinate complexes with an O-bondedOPPh3, threeη5-C5H4PPh2ligands and lattice thf. The centroids of the C5 ringsand the oxygen atom surround the central metal in a distorted tetrahedralarray.

New insights into chalcogen bonding provided by co-crystal structures of benzisoselenazolinone derivatives and nitrogen bases

CrystEngComm ◽  
2019 ◽  
Vol 21 (10) ◽  
pp. 1539-1542 ◽  
Author(s):  
Thomas Fellowes ◽  
Jonathan M. White
Keyword(s):  
Crystal Structures ◽  
X Ray ◽  
Nitrogen Bases ◽  
X Ray Crystallography ◽  
Derivatives Of

A number of derivatives of benzisoselenazolinones, including the drug ebselen, have been synthesized, and their interactions with various nitrogen bases characterized through X-ray crystallography.

Oxalato-Bridged Dinuclear Copper(II) Complexes ofN-Alkylated Derivatives of 1,4,7-Triazacyclononane: Synthesis, X-ray Crystal Structures and Magnetic Properties

2006 ◽  
Vol 2006 (23) ◽  
pp. 4872-4878 ◽  
Author(s):  
Matthew J. Belousoff ◽  
Bim Graham ◽  
Boujemaa Moubaraki ◽  
Keith S. Murray ◽  
Leone Spiccia
Keyword(s):  
Magnetic Properties ◽  
Crystal Structures ◽  
Dinuclear Copper ◽  
X Ray ◽  
Derivatives Of

ansa-Chromocene Complexes. 2. Isocyanide Derivatives of Cr(II) and Cr(III), Their Syntheses, X-ray Crystal Structures, and Physical Properties

2006 ◽  
Vol 25 (3) ◽  
pp. 719-732 ◽  
Author(s):  
Pamela J. Shapiro ◽  
Ralph Zehnder ◽  
David M. Foo ◽  
Philippe Perrotin ◽  
Peter H. M. Budzelaar ◽  
...  
Keyword(s):  
Physical Properties ◽  
Crystal Structures ◽  
X Ray ◽  
Derivatives Of

ChemInform Abstract: Syntheses and X-Ray Crystal Structures of Derivatives of 2,2′,4,4′,6,6′-Hexaiodobiphenyl.

ChemInform ◽  
2010 ◽  
Vol 32 (50) ◽  
pp. no-no
Author(s):  
Pier Lucio Anelli ◽  
Marino Brocchetta ◽  
Costantino Maffezzoni ◽  
Paola Paoli ◽  
Patrizia Rossi ◽  
...  
Keyword(s):  
Crystal Structures ◽  
X Ray ◽  
Derivatives Of
Sign in / Sign up

Export Citation Format

Share Document