Antimony, tris structure

Antimony, tris(ethyldithiocarbonato)-stereochemistry, 1,82 structure, 1,82 Antimony, tris(oxalato)-stereochemistry, 4, 82 structure, 1, 82... 

Aside from these three classes (species with unfilled inner subshells, with unpaired electrons, or with two different oxidation states of the same element), there are a number of colored inorganic substances about which generalizations may be set up only with difficulty. Among these are many of the elementary nonmetals, a large number of covalent salts (such as mercuric iodide, cadmium sulfide, silver phosphate and lithium nitride), a number of nonmetal halides (iodine monochloride, selenium tetrachloride, antimony tri-iodide, etc.), and the colored ions, chromate, permanganate, and Ce(H20) v, whose central atoms presumably have rare-gas structures. 

Antimony tri- and pentafluoride form very stable compounds, e.g., SbF6-2SbF3, which distills unchanged at 390°C (165). No exact study of their structures has so far been made. It is possible that they are saltlike in the solid state (e.g., [SbF2][SbF ]-SbF3) and go over to a molecular form on vaporization. Antimony pentafluoride dissolves in AsF3 and the conductiv-... 

Antimony, tris(ethyldithiocarbonato)-stereochemistry, 82 structure, 82 Antimony, tris(oxalato)-stereochemistry, 82 structure, 82 Antimony tribromide stereochemistry, 36 Antimony trichloride geometry, 36 stereochemistrv, 36 Antimony trifluoride geometry, 36 stereochemistry, 36 Antimony trihalides stereochemistry, 36 Antimony triiodidc sulfur complex stereochemisir), 36 Aquapentaammine complexes structure, 8 Aquation, 291... 

X-ray powder diagrams obtained by the Guinier method show the tris (O-ethyl dithiocarbonato) complexes of chro-mium(III), indium(III), cobalt(III), iron(III), arsenic(III), and antimony(III) to be isomorphous. Carrai and Gottardi have determined the structure of the arsenic(III)18 and anti-mony(III)19 complexes. Crystallographic data for the cobalt(III) and chromium(III) ethylxanthate complexes are given by Derenzini20 and Franzini and Schiaffino,21 respectively. 

Monomeric carbene complexes with 1 1 stoichiometry have now been isolated from the reaction of 4 (R = Bu, adamantyl or 2,4,6-trimethylphenyl R = H) with lithium l,2,4-tris(trimethylsilyl)cyclo-pentadienide (72). The crystal structure of one such complex (R = Bu) revealed that there is a single cr-interaction between the lithium and the carbene center (Li-C(carbene) 1.90 A) with the cyclopentadienyl ring coordinated in an if-fashion to the lithium center. A novel hyper-valent antimonide complex has also been reported (73). Thus, the nucleophilic addition of 4 (R = Mes R = Cl) to Sb(CF3)3 resulted in the isolation of the 1 1 complex with a pseudo-trigonal bipyramidal geometry at the antimony center. 

Xenon difluoride reacts also with some halosubstituted alkanes18,19 at room temperature in chloroform, carbon tetrachloride, dichloromethane or bromoform, and depending on the nature of the solvent used chloro or bromo derivatives are isolated with imidazo-(l,2-fr)-pyridazine18. Carbon tetrachloride reacts with xenon difluoride at 180°C, while room-temperature transformations are achieved when various catalysts [antimony trifluoride, tantalum(V) fluoride or silica dioxide] are used, whose structure also influences the product distribution20. Tris(fluorosulfonyl)methane gives a fluoro-substi-tuted product in its reaction with xenon difluoride in difluorodichloromethane21. 

The crystal structure of /i-oxo-bis[tris(p-chlorophenyl)(l,l,l-trifluoro-2,4-pen-tanedionato-0,0 )antimony(V)] 1/2 chloroform has been determined375. The compound crystallizes in triclinic system, space group PI. The binuclear Sb-complex consists of two distorted octahedra joined by an O atom which is situated at inversion centre the Sb-O-Sb bridge is linear. This seems to be the first example of a linear Sb-O-Sb linkage. The bridged oxygen and one of the oxygens of/3-diketone occupy trans-positions. The/3-diketonate forms two distinct Sb-0 bonds ... 

The first structurally characterized antimony derivatives of tripodal ligands such as tris(aminoethyl)amines, N[CH2CH2N(R)H]3, named azastibatranes, were obtained from the reaction between tetramines and tris(dialkylami-no)stibine. Thus, treatment of [N(CH2CH2N(Me)H] with Sb(NEt2)3 led to 16a isolated as a colorless oil in 95% yield. 

Antimonate, tris(ethyl dithiocarbonate)-electron pair, 37 Antimony, biphenyltriphenyl-stereochemistry, 46 Antimony, pentaflnoro-lone electron pair structure, 50 Antimony, pentamethyl- H NMR, 41 Antimony, pentaphenyl-stereochemistry, 40 structure, 39 Antimony, pentatolyl-stereochemistry, 40... 

Antimony(III) complexes with bidentate sulfur ligands form an interesting series of structural types. In tris(diethyldithiocarbamate)antimony(IIl) the sulfur atoms fall into two groups. Firstly, there are three fac sulfurs with short d(Sb—S) 2.487-2.631 A bonds, one from each ligand, and then there are three longer bonds d(Sh—S) 2.886-2.965 A (40). There is a large gap in the coordination sphere and this has been ascribed to a sterically active lone pair. There is a weak Sb- -S 3.389 A interaction between molecules within van der Waals radii. Similar results have been obtained for Sb(S2CNPr2) and tris(l-pyrrolidinecarbo-dithioato)antimony(III). Hoskins et used the bidentate EtOCSj to prepare... 

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