The isotopic cluster of CpRe(CO)2(h3-allyl) (from page three of this poster).
| The four peaks in the isotopic cluster of a typical monorhenium organometallic compound arise from the existence of two main naturally occurring isotopes for both rhenium and carbon. |
| Abundances: 185Re 37%, 187Re 63%; 12 C 99%, 13C 1% |
| For each of the parent ions identified in these experiments, the calibrated mass values observed combined with the correct isotopic pattern conclusively establish that the assignments are accurate. |