Synthesis and structures of main group cage compounds containing boron, silicon, and phosphorus atoms

Isomers in the chemistry of iron carbonyls

“…Here, again three carbonyls created a trigonal plane and η 1 -C 5 H 10 N 2 through C donor site with PEt 3 molecule completing a trigonal bipyramidal arrangement (FeC 4 P). The inner coordination sphere in this complex is somewhat larger with the values of 9.469 Å (molecule 1) and 9.485 Å (molecule 2) than those found in Dou et al 1993 ). The C eq -Fe-C eq and C eq -Fe-L ax bond angles deviated from the ideal angles of 120.0 ° and 90.0 ° by 7.9 ° and 8.4 ° (molecule 1) and 11.1 ° and 6.4 ° (molecule 2).…”

“…Structure of cream orthorhombic [Fe 0 (COI 3 ( η 1 -C 5 H 10 N 2 ) (PEt 3 )] (Hitchcock et al 1986 ) is similar to that of Fe 0 (CO) 4 {P 2 (tmpB) 2 (SiMe 2 )}] (Dou et al 1993 ). Here, again three carbonyls created a trigonal plane and η 1 -C 5 H 10 N 2 through C donor site with PEt 3 molecule completing a trigonal bipyramidal arrangement (FeC 4 P).…”

“…In yellow monoclinic [Fe(CO) 4 {P 2 (tmpB) 2 (SiMe 2 )}] (Dou et al 1993 ), three carbonyls created a trigonal plane around each Fe(0) atom and the remaining fourth CO group with unidentate P donor atom of P 2 (tmpB) 2 (SiMe 2 ) ligand occupied an axial position (FeC 4 P). The sum of fi ve bond distances ) plus Fe-P] are 9.416 Å (molecule 1) and 9.411 Å (molecule 2).…”

“…Analyses of the data in Table 2 show that there are six derivatives in which iron(0) atoms are fi ve coordinated (trigonal-bipyramidal) with the chromophores FeC 4 P (Hitchcock et al 1986, Dou et al 1993, FeC 4 Si (Zybill et al 1989 ), FeC 3 P 2 (Tuochard et al 1986 ), FeP 2 HNC (Cygler et al 1983 ) and FeP 2 HCSi (Knorr et al 1988 ). The fi ve derivatives (Cygler et al 1983, Hitchcock et al 1986, Tuochard et al 1986, Zybill et al 1989, Dou et al 1993 ) contain two crystallographically independent molecules and one (Knorr et al 1988 ) contains three such molecules.…”

“…The fi ve derivatives (Cygler et al 1983, Hitchcock et al 1986, Tuochard et al 1986, Zybill et al 1989, Dou et al 1993 ) contain two crystallographically independent molecules and one (Knorr et al 1988 ) contains three such molecules. The sum of all fi ve Fe(0)-L bond distances (molecule 1 vs. molecule 2) are 9.411 Å vs. 9.416 Å (Dou et al 1993), 9.472 Å vs. 9.485 Å (Hitchcock et al 1986), 9.321 Å vs. 9.351 Å (Zybill et al 1989.037 Å (Tuochard et al 1986 ). Unfortunately for FeP 2 HNC (Cygler et al 1983 ) and FeP 2 HCSi (Knorr et al 1988 ) the Fe-H bond distances are not available.…”