13CO molecule

Figure 7.4 (A) STM image (240 x 125)2 of two rotational domains of the Moire pattern formed at Pt(l 11) by CO at 1 bar at room temperature. (B) High-resolution image of the CO overlayer at 1 bar. (C) The ( /l9 x /T9) R23.40—13CO structure the unit cell is shown the dark circles represent CO molecules adsorbed in nearly atop sites. (Reproduced from Ref. 9).

The R(0) transition is observed in 12CO and 13CO in two molecular clouds along the line of sight. Calculate the relative velocities of the two clouds if the R(0) transitions in each molecule are coincident. Comment on the possible reason for the relative velocities. 

A105 Sbrignadello, G., Batiston, G., Bor, G. Inorg. Chim. Acta 14, 69 (1975) The i>(CO) IR spectrum of MnRe(CO)i0 and its analysis, with emphasis on features derived from 13CO-containing molecules... 

Sequential dosing with 13to and 13co indicate that above 0.5 coverage (c(2x2))CO probably enters vacant linear sites, displacing neighbouring CO molecules into two-fold bridge sites. 

From an analysis such as described here, the relative abundances of interstellar molecules N(molecule)/N(H2) in various sources can be determined. Table 2 shows a representative list of abundances in two sources, TMC1 and Orion (OMC1). The relative abundance of a species with respect to H2 is more uncertain that the absolute column density because it is normally obtained by dividing the absolute column density by the 13CO value and then estimating the ratio of the 13CO to H2 column densities (Irvine et al. 1985). Thus, one should not assume better than one order of magnitude accuracy in the numbers shown in Table 2. Still, several trends can be discovered in this table ... 

In the review period there have been many studies of molecular motion using analysis of chemical shift anisotropy lineshapes. One that nicely illustrates what is currently possible concerns the motion of 13CO intercalated in C o.9 This is a particularly interesting example as both the CO and C6o molecules undergo reorientation, with the onset of motion occurring at different temperatures for the two species. Furthermore, the work uses a prior calculation of the potential... 

To date 150 species have been detected in the interstellar space.1 Among these species only a handful of molecules have been spatially resolved in disks CO (and the isotopomers 13CO and C180), CN, HCN, DCN, HNC, H2CO, C2H, CS, HCO+, H13CO+, DCO+, and N2H+ (Koemer Sargent 1995 Dutrey etal. 1997 ... 

Fig. 1.1 Structural model of the Pt(lll) surface relaxation in 0.1 M HCIO4 induced by the (vT9xVT9)-13CO phase. Small solid and open circles represent the CO molecules in nearly top and bridge sites, respectively. Large circles in different shades of gray represent the Pt atoms in three groups with-...

---