Ligand chelation, P–C bond cleavage, and phenyl-group transfer in the reaction between RCCo3(CO)9 and 1,8-bis(diphenylphosphino)naphthalene (dppn): Syntheses and X-ray diffraction structures of PhCCo3(CO)4(μ-CO)3(dppn) and PhCCo3(CO)8[η1-PPh(OH)C10H6P(O)Ph2]

2007 ◽  
Vol 692 (5) ◽  
pp. 968-975 ◽  
Author(s):  
William H. Watson ◽  
Srikanth Kandala ◽  
Michael G. Richmond
Keyword(s):  
Bond Cleavage ◽  
Phenyl Group ◽  
X Ray Diffraction ◽  
X Ray ◽  
Group Transfer

N–O Bond Cleavage During the Deprotonation of N,O-Bis(trimethylsilyl)hydroxylamine

2008 ◽  
Vol 63 (3) ◽  
pp. 339-341 ◽  
Author(s):  
Ajay Venugopal ◽  
Alexander Willner ◽  
Norbert W. Mitzel
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Elemental Analysis ◽  
Bond Cleavage ◽  
State Structure ◽  
X Ray Diffraction ◽  
Solid State Structure ◽  
X Ray ◽  
Potassium Hydride ◽  
Oxygen Atoms

The reaction of N,O-bis(trimethylsilyl)hydroxylamine with potassium hydride in pentane affords a product of the formula {K6[OSiMe3]4[ON(SiMe3)2]2}, resulting from deprotonation followed by N-O bond cleavage and 1,2-silylshift. The compound was characterised by elemental analysis and by single crystal X-ray diffraction. The aggregate consists of a K3O3 bis-cubane core, with N(SiMe3)2 groups at the oxygen atoms shared by the two cubes, andMe3Si groups attached to the four O vertices. Two weak K···N interactions are also detected in the solid state structure.

scholarly journals Synthesis and Characterization of New Diiron and Diruthenium μ-Aminocarbyne Complexes Containing Terminal S-, P- and C-Ligands

2007 ◽  
Vol 62 (3) ◽  
pp. 427-438 ◽  
Author(s):  
Vincenzo G. Albano ◽  
Luigi Busetto ◽  
Fabio Marchetti ◽  
Magda Monari ◽  
Stefano Zacchini ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Diffraction Study ◽  
Coordination Mode ◽  
Bond Cleavage ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dithiocarbamate Ligand ◽  
High Yields

The diiron aminocarbyne complexes [Fe2{μ-CN(Me)(R)}(μ-CO)(CO)(NCMe)(Cp)2][SO3CF3] (R = Xy1, 1a; R = Me, 1b; R = CH2Ph, 1c; Xy1 = 2,6-Me2C6H3) undergo replacement of the coordinated nitrile by halides, diethyldithiocarbamate, and dicyanomethanide to give [Fe2{μ-CN(Me) (R)}(μ-CO)(CO)(X)(Cp)2] complexes (R = Me, X = Br, 4a; R = Me, X = I, 4b; R = CH2Ph, X = Cl, 4c; R = CH2Ph, X = Br, 4d; R = CH2Ph, X = I, 4e; R = Xy1, X = SC(S)NEt2, 5a; R = Me, X = SC(S)NEt2, 5b; R = Xy1, X = CH(CN)2, 7), in good yields. The molecular structure of 5a shows an unusual η1 coordination mode of the dithiocarbamate ligand. Similarly, treatment of [M2{μ-CN(Me) (R)}(μ-CO)(CO)(NCMe)(Cp)2][SO3CF3] (M = Fe, R = Xy1, 1a; M = Fe, R = Me, 1b; M = Ru, R = Xy1, 2a; M = Ru, R = Me, 2b) with a series of phosphanes generates the cationic complexes [M2{μ- CN(Me)(R)}(μ-CO)(CO)(P)(Cp)2][SO3CF3] (M = Fe, R = Xy1, P = PPh2H, 6a; M = Fe, R = Xy1, P = PPh3, 6b; M = Fe, R = Xy1, P = PMe3, 6c; M = Fe, R = Me, P = PMe2Ph, 6d; M = Fe, R = Me, P = PPh3, 6e; M = Fe, R = Me, P = PMePh2, 6f; M = Ru, R = Xy1, P = PPh2H, 6g; M = Ru, R = Me, P = PPh2H, 6h), in high yields. The molecular structure of 6a has been elucidated by an X-ray diffraction study. The reactions of [Fe2{μ-CN(Me)(Xyl)}(μ-CO)(CO)(NCR′)(Cp)2][SO3CF3] [R′ = Me, 1a; R′ = tBu, 3] with PhLi and PPh2Li yield [Fe2{μ-CN(Me)(Xy1)}(μ-CO)(CO)(Ph)(Cp)2] (8) and [Fe2{μ-CN(Me)(Xy1)}(μ-CO)(CO)(PPh2)(Cp)2] (9), respectively. The molecular structure of 8 has been ascertained by X-ray diffraction. Conversely, the reaction of 1a with MeLi generates the aminoalkylidene compound [Fe2{C(Me)N(Me)(Xy1)}(μ-CO)2(CO)(Cp)2] (10).Finally, the acetone complex [Fe2{μ-CN(Me)(Xy1)}(μ-CO)(CO)(OCMe2)(Cp)2][SO3CF3] (12) reacts with lithium acetylides to give complexes [Fe2{μ-CN(Me)(Xy1)}(μ-CO)(CO)(C≡CR)(Cp)2] (R = p-C6H4Me, 11a; R = Ph, 11b; R = SiMe3, 11c), in high yields. Filtration through alumina of a solution of 11a in CH2Cl2 results in hydration of the acetylide group and C-Si bond cleavage, affording [Fe2{μ-CN(Me)(Xy1)}(μ-CO)(CO){C(O)Me}(Cp)2] (12).

A Novel Indole-Containing Diarylethene: Synthesis, Crystal Structure and Photochromism

2017 ◽  
Vol 41 (7) ◽  
pp. 423-426 ◽  
Author(s):  
Chunhong Zheng ◽  
Guanming Liao ◽  
Congbin Fan ◽  
Renjie Wang ◽  
Shouzhi Pu
Keyword(s):  
Crystal Structure ◽  
Quantum Yield ◽  
Single Crystal ◽  
Diffraction Analysis ◽  
Phenyl Group ◽  
X Ray Diffraction ◽  
X Ray ◽  
Meta Position ◽  
Thiophene Moiety ◽  
Photochemical Properties

An indole-containing diarylethene with a trifluoromethyl function at the meta-position of the phenyl group attached to the thiophene moiety was synthesised. Its structure was determined by single-crystal X-ray diffraction analysis and its photochemical properties in solution and in the single crystalline phases were studied. The compound showed relatively high fluorescent modulation efficiency and cyclisation quantum yield.

Synthese und Struktur von α,β-ungesättigten aliphatischen Diazenen / Preparation and Structures of α,β-Unsaturated Aliphatic Diazenes

1989 ◽  
Vol 44 (5) ◽  
pp. 543-547 ◽  
Author(s):  
Herbert W. Roesky ◽  
Uwe Otten ◽  
Regine Herbst ◽  
Mathias Noltemeyer
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Hydrogen Chloride ◽  
Phenyl Group ◽  
X Ray Diffraction ◽  
X Ray

The reactions of 1,1,2,2-tetrafluoroethane-1,2-bisulfenyl-chloride 1 and symmetrical azines 2 yield the conjugated trans-diazenes 3 as deep-coloured solids. Unsymmetrical azines 4 react with 1 under elimination of hydrogen chloride to give 1,3-dithiolane-substituted azine derivatives as pale-coloured liquids. The crystal structure of 3b has been determined by single crystal X-ray diffraction. A participation of the phenyl group in the conjugated system is not observed in 3b.

Bis-, Tris- and Tetrakis(lithiomethyl)germanes: New Building Blocks for Organogermanium Compounds

2004 ◽  
Vol 59 (11-12) ◽  
pp. 1570-1578 ◽  
Author(s):  
Carsten Strohmann ◽  
Eric Wack
Keyword(s):  
Single Crystal ◽  
Bond Cleavage ◽  
Building Blocks ◽  
X Ray Diffraction ◽  
X Ray ◽  
Organogermanium Compounds

Bis(lithiomethyl)germanes, R2Ge(CH2Li)2, tris(lithiomethyl)germanes, RGe(CH2Li)3, and tetrakis( lithiomethyl)germane, Ge(CH2Li)4, were prepared by the reductive C-S bond cleavage with lithium naphthalenide (LiC10H8) or lithium p,p’-di-tert-butylbiphenylide (LiDBB) and characterized by trapping with Bu3SnCl. The bis(lithiomethyl)germanes were used for the synthesis of 1,1-dimethyl-3,3-diphenyl-1-germa-3-silacyclobutane, 1,1-diethyl-3,3-diphenyl-1-germa-3-silacyclobutane, 1,1,3,3-tetraphenyl-1-germa-3-silacyclobutane and 1,1,3,3-tetraphenyl-1,3-digermacyclobutane. The single-crystal X-ray diffraction studies of methyltris(phenylthiomethyl)germane and tetrakis(phenylthiomethyl)germane, starting materials for the corresponding poly(lithiomethyl) germanes, indicate tetrahedrally arranged substituents at the germanium atoms.

Sign in / Sign up

Export Citation Format

Share Document