Rhenium chloride ReCl

Rhenium(V) chloride ReCl, +1225 Sodium chloride NaCl -30.2... 

Treatment of the rhenium sulfide chlorides with an excess of chlorine at temperatures above 450°C results in formation of ReCls 140). Reduction between 350 and 500°C gives binary rhenium chalcogenides 139,262). Action of water vapor on rhenium sulfide chlorides at 350-500°C produces oxysulfides 139). 

Dicyclopentadiene reacts with rhenium(III) chloride to give the polymeric complex [ReCl2(CioII,2)2] , and with triphenylphosphinerhe-nium(III) chloride to give the complex [ReCl(CioHi2)2(PPh3)] (49). The structures of these complexes are unknown. 

ReCls Rhenium (V) chloride, 1 180 ReCl6K2 Potassium hexachloro-rhenate(IV), 1 178 Re03 Rhenium(VI) oxide, 3 186 Re04NH4 Ammonium perrhenate, 1 177, 178... 

C. The characteristic infrared stretch of the ReN triple bond has not been found due to interference from Ph modes the ReCl stretch occurs at 323 cm (Nujol mull). Despite the color of the complex in the solid state and the yellow color of a CH2CI2 solution, no distinctive features appear in the visible region of the spectrum. The dipole moment of 1.6 (3) D is consistent with the X-ray crystal structure obtained elsewhere that reveals a distorted square pyramid with an apical nitrido ligand and mutually trans chloride ligands in the basal plane. The triphenylphosphine ligands are distorted toward the empty rhenium coordination site. 

Titanium(IV) chloride forms a number of different adducts with trans-[ReCl(N2)(PMe2Ph)4] (see Table 1) that are believed to involve dinitrogen bridging between rhenium and titanium. Hydrolysis or treatment of these adducts with ethanol results in the virtual quantitative recovery of the original rhenium-dinitrogen complex. 

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