Abstract
<p>The series for carbonyl clusters of transition metals have been developed. They may be considered to be formed with a fragment centered around the 14 electron valence content. The capping series are based on the fragment of 12 electron valence content. The formulas of clusters can be decomposed into series from which the shapes of clusters may be predicted. The electron counting numbers of carbonyl clusters can be identified.</p>
Highlights
The discovery of the first mono-skeletal transition metal carbonyl Ni(CO)4 one hundred and twenty five years ago (Mond, et al, 1890), opened a wide gate for the synthesis of hundreds of metal carbonyl complexes
During the study of osmium carbonyl clusters(Kiremire,2015c, 2015d) it was found that Os(CO)3 fragment which carries 14 electron valence content can be utilized as a fulcrum to generate as many hypothetical osmium carbonyl clusters as possible
If we divide each formula by the coefficient of osmium in that formula we just obtain a constant of Os(CO)3 in each case
Summary
The discovery of the first mono-skeletal transition metal carbonyl Ni(CO) one hundred and twenty five years ago (Mond, et al, 1890), opened a wide gate for the synthesis of hundreds of metal carbonyl complexes. The structure of the nickel carbonyl Ni(CO) at the time was proposed to be as shown in Figure 1(F-1) in which the nickel atom exerted a valence of 2 while the valence of carbon and oxygen were 4 and 2 respectively. Many more carbonyl complexes of higher nuclearity skeletal metal atoms were synthesized (Dahl, et al, 2010). With emergency of borane chemistry (Stock, 1933; Longuet-Higgins , 1943; Lipscomb, 1963; Mingos, 1972; Lipscomb, 1976; Wade, 1976, Rudolph, 1976; Hoffmann, 1982; Mingos, 1984; King, 1986;Greenwood and Earnshaw,1998; Shriver and Atkins, 1999;Jemmis et al, 2001; 2002; 2003; Balakrishnarajan and Hoffmann, 2004; Jemmis, 2005; Housecroft and Sharpe, 2005; Jemmis, et al, 2008; Welch, 2013), it was found that the structures of carbonyl clusters could be explained using Polyhedral Skeletal Electron Pair Theory (PSEPT) or Wade-Mingos rules (Wade, 1971;Mingos, 1972). It became a great challenge to scientists to explain the intriguing www.ccsenet.org/ijc
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