Publication Date:
2019
Description:
〈p〉Boron monofluoride (BF) is a diatomic molecule with 10 valence electrons, isoelectronic to carbon monoxide (CO). Unlike CO, which is a stable molecule at room temperature and readily serves as both a bridging and terminal ligand to transition metals, BF is unstable below 1800°C in the gas phase, and its coordination chemistry is substantially limited. Here, we report the isolation of the iron complex Fe(BF)(CO)〈sub〉2〈/sub〉(CNAr〈sup〉Tripp2〈/sup〉)〈sub〉2〈/sub〉 [Ar〈sup〉Tripp2〈/sup〉, 2,6-(2,4,6-(〈i〉i-〈/i〉Pr)〈sub〉3〈/sub〉C〈sub〉6〈/sub〉H〈sub〉2〈/sub〉]〈sub〉2〈/sub〉C〈sub〉6〈/sub〉H〈sub〉3〈/sub〉; 〈i〉i〈/i〉-Pr, 〈i〉iso〈/i〉-propyl], featuring a terminal BF ligand. Single-crystal x-ray diffraction as well as nuclear magnetic resonance, infrared, and Mössbauer spectroscopic studies on Fe(BF)(CO)〈sub〉2〈/sub〉(CNAr〈sup〉Tripp2〈/sup〉)〈sub〉2〈/sub〉 and the isoelectronic dinitrogen (N〈sub〉2〈/sub〉) and CO complexes Fe(N〈sub〉2〈/sub〉)(CO)〈sub〉2〈/sub〉(CNAr〈sup〉Tripp2〈/sup〉)〈sub〉2〈/sub〉 and Fe(CO)〈sub〉3〈/sub〉(CNAr〈sup〉Tripp2〈/sup〉)〈sub〉2〈/sub〉 demonstrate that the terminal BF ligand possesses particularly strong -donor and -acceptor properties. Density functional theory and electron-density topology calculations support this conclusion.〈/p〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
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Chemistry and Pharmacology
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Computer Science
,
Medicine
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Natural Sciences in General
,
Physics
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