Cadmium Iodide and Lithium Iodo Cadmate Solutions in Dimethylformamide
نویسندگان
چکیده
C dl2 dissociates in dimethylformamide (D M F) into Cd(DM F)62+, CdI(DM F)5+, C dl3~ and C dl42-. Rapid scrambling occurs at ambient temperature in DM F solutions containing Cdl2 and M BH4 (M = Na, Li). At 213 K these exchange processes are slowed down to allow the detection o f C dl42“, C dl3", CdI3(BH4)2-, CdI2(BH4)22-, CdI(BH4)32-, CdI(BH4)2" and Cd(BH4)3~ by ,13Cd NM R spectroscopy. The BH4 groups are bound to the Cd centre via two hydrogen atoms as derived from the multiplicity o f the I13Cd signals. C dl2 dissolves in diglyme as a molecular entity. Its reaction with M BH4 proceeds via solvated CdI(BH4) and Cd(BH4) 2 to CdI(BH4)32' and Cd(BH4)3~. Solubility restriction prevent a m Cd NM R study o f solutions in which the M BH4; C dl2 ratio exceeds 1:1.
منابع مشابه
Metal Tetrahydroborates and Tetrahydroboratometalates, 18 [1] Studies on the Formation of Cadmium(II)-tetrahydroborates with Tetrahydroborate and Iodide
Heinrich Nöth*, M artina Thom ann Institute of Inorganic Chemistry, University of Munich, Meiserstraße 1, D-80333 München Z. Naturforsch. 49b, 9-14 (1994); received August 30, 1993 Cadmium Bis(tetrahydroborate), Tris(tetrahydroborato)cadmate, Tetrakis(tetrahydroborato)cadmate, Iodo Tetrahydroborato Cadmates, nB NMR Spectra, U3Cd NMR Spectra The structure of cadmium tetrahydroborate in THF solut...
متن کاملAn X-Ray Diffraction Study on the Structure of Concentrated Aqueous Caesium Iodide and Lithium Iodide Solutions
X-Ray scattering measurements of 2.78 and 5.56 molal aqueous solutions of caesium iodide and 2.78 and 6.05 molal lithium iodide were carried out at 293 and 343 K Differences in the radial distribution functions (DRDFs) have been obtained between the caesium iodide and lithium iodide solutions of similar composition, the latter being taken as a reference for the data analysis of the former. The ...
متن کاملLithium cadmate-mediated deprotonative metalation of anisole: experimental and computational study.
Lithium cadmates bearing different ligands were compared with efficient (TMP)(3)CdLi (TMP = 2,2,6,6-tetramethylpiperidino) for their ability to deprotometalate anisole. The generated arylcadmates were evidenced using I(2). The results show that it is possible to replace only one of the TMP (with a piperidino, a diisopropylamino, a butyl, or a sec-butyl) without important yield drop. In the ligh...
متن کاملMetal Tetrahydroborates and Tetrahydroborato Metalates, 17 [1] Bonding in Cadmium Bis(tetrahydroborate), and the Reaction with Lithium Tetrahydroborate
Cadmium bis(tetrahydroborate) has been prepared from dimethyl cadmium and H3B T H F in tetrahydrofuran. Low temperature ll3Cd N M R spectra recorded for THF, monoglyme and diglyme solutions show a septet with l/ ( ll3Cd'H) = 273 Hz. This proves that the BH4“ groups are bound to the metal centre via triple hydride bridges. Reaction o f Cd(BH4) 2 with LiBH4 yields LiCd(BH4) 3 quantitatively in di...
متن کاملElectrochemical behaviour of iodide at a rotating platinum disk electrode in methanol
The oxidation of iodide at a rotaling platinum disk electrode in methanol has been studied. At low concentrations only one oxidation wave is seen, but at higher concentrations two steps are discerned. This is in accordance with the theory, assuming that the equilibrium between iodide, ttiiodide and iodine is reached fast and the oxidation of iodide to iodine occurs reversibly. only in approxima...
متن کامل