_P.-Powell-auth.-Principles-of-Organometallic-Chemistry-Springer-Netherlands-1988

General reactions of transition metal complexes
CAR BONYL HYDRIDE
ANO HALIDES
ORGANO-MANGANESE
COMPOUNDS
HMn(C0)5
XMo(ţ ~"•'
_, /7 ~ezSnCl
.!. [ Mn 2 ( CO lto] + e j'M_n_(_C_O_l5-_--,j
2 -e · ·
ClRe(C/Fe(CO)~ Hg(CN)z\ ~ 2
(E=Si,Ge,Sn,Pb)
(OC )5 Mn-Re(COJ5 Me2Sn [ Mn(COl5: 2
MIXED METAL
CARBONYLS
(MnFe 2 (CO)I~r
Hg i Mn(C0)5 } 2
MAIN GROUP
DERIVATIVES
Fig. 5.15 Some reactions of Mn(CO);.
5.2.9 Carbonyl halides
Metal-metal bonds in transition metal carbonyls can be cleaved by halogens.
Mn 2 (C0) 10 affords the complexes XMn(C0) 5 , (X= Cl. Br, I) (cf. Os 3 (C0) 12 ,
p. 352). Halogens also attack metal carbonyls which do not possess M-M bonds
with loss of carbonyl ligands e.g.
Fe(CO), + X 2 ----. cis-Fe(C0) 4 X 2 + CO
Mo(CO). + Ci 2 ----. i!Mo(CO).ClzL + 2CO
2Fe,(C0) 12 + 31 2 ----. 3Fe) 2 (CO), (l\.1l
Carbonyl halides of the platinum group metals. however, are often prepared by
reacting the metal halide with carbon monoxide. [Ru(CO),ClJ 2 and [Rh(C0) 2 Cl1z
are mentioned above (p. 167). Platinum forms Pt(C0) 2 X 2 and [Pt(CO)X 2 },. The
latter were the first carbonyl complexes of any element tobe described. They were
reported by the French chemist. P. Schutzenberger. in 18 70.
5.3 Some general reactions of transition metal complexes
Figure 5.16 shows the structures of the 18-electron complexes ML" ( n = 4 to 7)
the 16-electron species ML" 1 which would result from the dissociation of one
ligand: L and some 14-electron species which would arise from the dissociation of
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