Neutral and Cationic Phosphoramide Adducts of Silicon Tetrachloride: Synthesis and Characterization of Their Solution and Solid-State Structures

2007 ◽  
Vol 14 (1) ◽  
pp. 234-239 ◽  
Author(s):  
Scott E. Denmark ◽  
Brian M. Eklov
Keyword(s):  
Solid State ◽  
Silicon Tetrachloride ◽  
Synthesis And Characterization ◽  
Solid State Structures

Synthesis and Characterization of FunctionalizedN,N‘-Diphenylformamidinate Silver(I) Dimers:  Solid-State Structures and Solution Properties

1999 ◽  
Vol 38 (24) ◽  
pp. 5571-5578 ◽  
Author(s):  
Stephen J. Archibald ◽  
Nathaniel W. Alcock ◽  
Daryle H. Busch ◽  
David R. Whitcomb
Keyword(s):  
Solid State ◽  
Synthesis And Characterization ◽  
Solution Properties ◽  
Solid State Structures

Phenylsilane dehydrocoupling and addition to styrene catalyzed by (R-indenyl)Ni(phosphine)(methyl) complexes

2009 ◽  
Vol 87 (1) ◽  
pp. 280-287 ◽  
Author(s):  
Yaofeng Chen ◽  
Davit Zargarian
Keyword(s):  
Solid State ◽  
Nmr Spectra ◽  
Variable Temperature ◽  
Structural Parameters ◽  
Catalytic Cycle ◽  
Synthesis And Characterization ◽  
H Nmr ◽  
Solid State Structures ◽  
Indenyl Complexes

This report describes the synthesis and characterization of the Ni–Me complexes (R-indenyl)Ni(PR′3)Me (R = 1-i-Pr, 1-SiMe3, and 1,3-(SiMe3)2; R′= Me, Ph) and outlines their catalytic reactivities in the dehydrogenative oligomerization of PhSiH3 and its addition to styrene in the absence of initiators/activators. Observation of higher hydrosilylation activities for PPh3-based compounds featuring bulky substituents on the indenyl ligand confirms earlier suggestions that phosphine dissociation is an important component of the catalytic cycle for this reaction. In contrast, oligomerization of PhSiH3 is more facile with PMe3-based precursors and independent of the steric bulk of the indenyl ligand, implying that this reaction does not involve phosphine dissociation. These conclusions are consistent with the variable-temperature 1H NMR spectra of {1,3,-(SiMe3)2-indenyl}Ni(PR′3)Me and various structural parameters observed in the solid-state structures of {1,3,-(SiMe3)2-indenyl}Ni(PPh3)Me, {1,3,-(SiMe3)2-indenyl}Ni(PMe3)Cl, and {1-SiMe3-indenyl}Ni(PMe3)Me.Key words: nickel-indenyl complexes, hydrosilylation, hydrosilane oligomerization.

scholarly journals Synthesis and characterization of pentanuclear Fe–Ir carbonyl clusters. Solid-state structures of [N(PPh3)2]2[FeIr4(CO)15] and [PPh4][Fe2Ir3(CO)14]

1989 ◽  
pp. 1109-1116 ◽  
Author(s):  
Roerto Dalla Pergola ◽  
Luigi Garlaschelli ◽  
Francesco Demartin ◽  
Mario Manassero ◽  
Norberto Masciocchi ◽  
...  
Keyword(s):  
Solid State ◽  
Synthesis And Characterization ◽  
Carbonyl Clusters ◽  
Solid State Structures

Synthesis and characterization of cationic iron complexes supported by the neutral ligands NPi-Pr3, NArPi-Pr3, and NSt-Bu3

2005 ◽  
Vol 83 (4) ◽  
pp. 332-340 ◽  
Author(s):  
Cora E MacBeth ◽  
Seth B Harkins ◽  
Jonas C Peters
Keyword(s):  
Solid State ◽  
Bond Distance ◽  
Iron Complexes ◽  
Synthesis And Characterization ◽  
Epr Spectrum ◽  
Chloride Complexes ◽  
Bipyramidal Structure ◽  
Neutral Ligands ◽  
Solid State Structures

This paper compares the local geometries, spin states, and redox properties of a series of iron complexes supported by neutral, tetradentate NP3 (tris(phosphine)amine) and NS3 (tris(thioether)amine) ligands. Our consideration of an Fe-mediated N2 fixation scheme similar to that proposed by Chatt for molybdenum motivates our interest in systems of these types. This report specifically describes the synthesis and characterization of cationic Fe(II) chloride complexes supported by the neutral ligands NPi-Pr3 (NPi-Pr3 = [N(CH2CH2P-i-Pr2)3]), NArPi-Pr3 (NArPi-Pr3 = [N(2-diisopropylphosphine-4-methylphenyl)3]), and NSt-Bu3 (NSt-Bu3 = [N(CH2CH2S-t-Bu)3]). The solid-state structures, electrochemistry, and magnetic properties of these complexes are reported. Whereas the NPi-Pr3 and NArPi-Pr3 ligands provide pseudotetrahedral S = 2 ferrous cations [Fe(NPi-Pr3)Cl]PF6 (1[PF6]) and [Fe(NArPi-Pr3)Cl]BPh4 (2[BPh4]) featuring a long Fe—N bond distance, the NSt-Bu3 ligand gives rise to a trigonal bipyramidal structure with a S = 1 ground state and a much shorter Fe–N interaction. The complexes 1[BPh4] and 2[BPh4] can be reduced under CO to give rise to the five-coordinate Fe(I) monocarbonyls [Fe(NPi-Pr3)CO]BPh4 (4[BPh4]) and [Fe(NArPi-Pr3)CO]BPh4 (5[BPh4]). The solid-state structures and electrochemistry of 4[BPh4] and 5[BPh4] are described, as is the EPR spectrum of 4[BPh4]. The synthesis and characterization of the hydride–dinitrogen complex [Fe(NPi-Pr3)(N2)(H)]PF6 (6[PF6]) has also been accomplished and its properties are also reported.Key words: nitrogenase, iron, polydentate phosphines, thioether ligands, N2 chemistry, nitrogen, Fe(I).

Mechanochemical solid state synthesis and characterization of CdxZn1−xS nanocrystals

2008 ◽  
Vol 179 (21-26) ◽  
pp. 1242-1245 ◽  
Author(s):  
Erika Dutková ◽  
Peter Baláž ◽  
Parviz Pourghahramani ◽  
Anh V. Nguyen ◽  
Vladimír Šepelák ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Synthesis ◽  
Synthesis And Characterization
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