Skeletal system boron

Franke j, Runge H and Bech R (1985) Boron as an antidote to fiourosis Part 1. Studies on the skeletal system. Fluoride 18 187-197. 

Collectively, these systems show how a hypercarbon atom occupying a pyramidal site above a ring of three, four, or five boron atoms (themselves occupying equatorial sites when n = 5,6, or 7, or tropical sites when n = 10 or 12) forms C-B bonds of increasing length and decreasing bond order as n or k increases. The data also show how the charges on the CH and BH units vary with n and k, and the extent to which the skeletal electron distribution in these systems varies as one or two BH units in the parent cluster are replaced by CH units. 

Boron is similar to the omega-3 fatty acids in that they affect - generally in a beneficial fashion - blood, brain, eye, immune system, and skeletal function, though a specific biochemical function has not been clearly defined. Boron and omega-3 fatty acids most likely interact at the cell membrane level to affect a variety of life processes (Nielsen 2002a). 

The polyhedral skeletal electron pair approach retains the condition that each metal atom uses its nine valence atomic orbitals. However it does not consider all the electron in the system but only those involved in the metal network. This approach is fundamentally grounded on the analogy existing between metal clusters and boron hydrides and carboranes. 

The term carborane generally designates a carbon-boron-hydrogen system in which both the carbon and boron atoms are incorporated into a skeletal network. In comparison, the carbon atoms of compounds designated as organoboron hydrides are generally of a ligand nature. The use of the prefix dovo has been su ested for the closed polyhedral carboranes (e.g.. Fig. 1) which, in addition, are named as derivatives of boron hydrides 11). 

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