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

Table 5.2 Binary carbonyls of the transition elements
First
V(CO).
Blue-green
Colourless liquid
b.p. 42°C
Air sensitive;
toxic. carcinogenic
Orange-red
Golden-yellow
m.p. 154"C
Air stable
Yellow liquid
Colourless;
sublimes;
transition
crystals
m.p. 51 'C dec.
Air sensitive
pyrophoric
series
Air stable
Trigonal
crystals
Air stable
(D.h)
Black solid
Co.(CO),.
Black solid
Black solid
Ru(CO),
Rh2 (CO):
Second
Tc,(CO)"'
transition
Rh.(CO),.
series
Os(CO),
Third
transition
series
W(CO).
Ir.(CO),.
higher clusters
Ni(C0) 4
Tetrahedral (Td)
Co 2 (C0) 8
Co 4 (C0), 2
Ir 4 (C0), 2
Rh 4 (C0), 2
*Unstable. For structures of bi- and polynuclear species, see Figure 5.4. Isolable compounds only listed.
b.p. 103"C
bipyramid (D,h)
Fe 2 (C0) 9
Golden plates
Air stable
Pe, (C0) 12
Ru 2 (Co):
Ru,(C0) 12
Os 2 (CO)!
Os, (C0), 2
Re 2 (C0) 10
Fe(CO),
Mn,(C0) 10
Cr(C0) 6
m.p. 150 C
Octahedral (Oh)
Mo(C0) 6
(Perr 1.81 B.M).
Octahedral (Oh)