Download Boron Chemistry–3. Selected Lectures Presented at the Third by H. Nöth PDF

By H. Nöth

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IRON DERIVATIVES The b a s a l B-B b o n d i n B 6 H 1 0 i s s u s c e p t i b l e t o i n s e r t i o n o f e l e c t r o p h i l i c r e a g e n t s . We h a v e + + h p r o t o n a t e d B 6 H 1 0 t o f o r m B 6 H n a n d h a v e i s o l a t e d t h e s a l t s B 6 H n B C l 4 " a n d 2-CH 3B 6Hi 0' BCl4" B 6H 10 + H (25). The B 6 H Fig. + n 10. + > B 6H n cation + 19 i s t h e o n l y known e x a m p l e o f a p o l y h e d r a l b o r a n e c a t i o n The s t r u c t u r e of B 6 H + n (Fig.

7 , *+02 ( i 9 6 0 ) ; b ) H. A. B e a l l a n d W. N . L i p s c o m b , I n o r g . C h e m . , 3 , 1783 (1964) ; c j F . L . Timms a n d C S . G. F h i l l i p s , i b i d . , (1968). W. J. C. L. F a r r y a n d L . J . E d w a r d s , J . Am. Chem. S o c , 8 l , 355^ (1959)· Remmel a n d S . G. S h o r e , U n p u b l i s h e d r e s u l t s . C a l a b r e s e a n d L . F . D a h l , J . Am. Chem. S o c , 93, 60**2 ( 1 9 7 1 ) . D e n t o n , W. R. C l a y t o n , M. M a n g i o n , S . G.

A d d i t i o n o f B 2H e t o F e ( C 0 ) 4 - B 6 H 9 ~ y i e l d s F e ( C 0 ) 4 - B 7 H i 2 ~ F e ( C 0 ) 4- B 6H 9~ fixed. 725 UM- The s a l t N ( n - C 4 H 9 ) 4 > F e ( C 0 ) 4 - B 7 H 1 2" + F e ( C 0 ) 422 B 7 H i 2~ h a s b e e n i s o l a t e d a n d t h e s t r u c t u r e h a s b e e n d e t e r m i n e d f r o m a n X - r a y s t u d y ( l ^ ) . Two v i e w s o f t h e s t r u c t u r e o f t h e F e ( C 0 ) 4 - B 7 H 1 2~ i o n a r e shown i n F i g . 1 2 . The s t r u c t u r e c a n b e c o n s i d e r e d t o b e a B 6Hg p e n t a g o n a l p y r a m i d i n t o w h i c h an F e ( C 0 ) 4 g r o u p a n d a BH3 g r o u p h a v e been i n s e r t e d i n t o non-adjacent bridging s i t e s .

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