Y. Nishihara, Kyoko Nara, K. Osakada
Aug 12, 2002
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0
Influential Citations
12
Citations
Journal
Inorganic Chemistry
Abstract
The reactions of (4-methoxyphenyl)boronic acid (1a) and of (2,6-dimethylphenyl)boronic acid (1 b) with (PMe 3 ) 3 Rh-(OC 6 H 4 Me-4) (2) in a 5:1 molar ratio result in the formation of cationic rhodium complexes with new tetraarylpentaborates [Rh(PMe 3 ) 4 ] + [B 5 O 6 Ar 4 ] - (3a, Ar = C 6 H 4 OMe-4; 3b, Ar = C 6 H 3 Me 2 -2,6). The characterization of 3a is as follows: orthorhombic space group P2 1 2 1 2 1 , a = 14.7600(5) A, b = 17.1675(5) A, c = 19.8654(5) A; V = 5033.7(3) A 3 ; Z = 4. The characterization of 3b is as follows: orthorhombic space group Pnma, a = 23.704(6) A, b = 17.254(8) A, c = 13.304(2) A; V = 5441(2) A 3 ; Z = 4. An intermediate complex, [Rh(PMe 3 ) 4 ] + [Ph 3 B 3 O 3 (OC 6 H 4 Me-4)] - (4), was isolated from the reaction of phenylboroxine, (PhBO) 3 , with 2. The tetraarylpentaborates smoothly undergo hydrolysis to give [Rh(PMe 3 ) 4 ] + [B 5 O 6 -(OH) 4 ] - (5).