ReClS

C weak, low yields without side reactions BCl, BBr, BI, SnCl, TiCl, TiBr, ReCl, FeCl2, and PtCl ... 

Rhenium Halides and Halide Complexes. Rhenium reacts with chlorine at ca 600°C to produce rheniumpentachloride [39368-69-9], Re2Cl2Q, a volatile species that is dimeric via bridging hahde groups. Rhenium reacts with elemental bromine in a similar fashion, but the metal is unreactive toward iodine. The compounds ReCl, ReBr [36753-03-4], and Rel [59301-47-2] can be prepared by careful evaporation of a solution of HReO and HX. Substantiation in a modem laboratory would be desirable. Lower oxidation state hahdes (Re X ) are also prepared from the pentavalent or tetravalent compounds by thermal decomposition or chemical reduction. 

Other types of bonding include donation by Ligand TT-orbitals, as in the classical Zeiss s salt ion [Pt( 7 -CH2=CH2)Cl3] [12275-00-2] and sandwich compounds such as ferrocene. Another type is the delta (5) bond, as in the Re2Clg ion, which consists of two ReCl squares with the Re—Re bonding and echpsed chlorides. The Re—Re 5 bond makes the system quadmply bonded and holds the chlorides in sterically crowded conditions. Numerous other coordination compounds contain two or more metal atoms having metal—metal bonds (11). 

The possibility of i) -H2 end-on coordination has also been mooted. For example, deposition of Pd atoms onto a krypton matrix doped with H2 at 12K apparently yields both Pd(t) -H2) and Pd( ) -H2) species, whereas with a Xe/H2 matrix only Pd(t) -H2) was obtained.Again, the complex [ReCl(H2)(PMePh2)4] appears to feature an asymmetrically-bonded H2 ligand which may well be ( ) -H2). ... 

Trigonal bipyramidal [MnBr N(C2H4NMe2)3 ]+ [ReCl(dppe)2]+... 

RECL record length, if file access is DIRECT BLANK specifies blank handling, either NULL or ZERO... 

RECL returns record length in direct access file... 

Re(T]3-CH2PMe2)(PMe3)4, 4, 134 ReC,sH4SCIP5 ReCl(PMe3)5,4, 134 ReC15H45N202Sis... 

ReCl(CNBu )(CNHBu )(PMe3)3]+, 4, 129 ReC2t,H,7N40,... 

TiCl4(THF) (N2)ReCI(PMe2Ph)4, 3, 329 4,133, TiRe2C36H54Cl7N202P4 Ti20Cl6(Et20) (N2)ReCl(PMe2Ph)4, 4,133 TiRe2C84H88Cl8N4P 8... 

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