TY - JOUR
T1 - Synthesis and/or molecular structures of some simple 2,1,7- and 2,1,12-ruthena- and cobaltacarboranes
AU - Lopez, M E
AU - Ellis, David
AU - Murray, Paul R.
AU - Rosair, Georgina M.
AU - Welch, Alan J.
AU - Yellowlees, Lesley J.
PY - 2010/8
Y1 - 2010/8
N2 - The ruthenacarboranes 2-(p-cymene)-2,1,7-closo-RuC2B 9H11 (2) (p-cymene = 1-methyl-4-isopropylbenzene) and 2-(p-cymene)-2,1,12-closo-RuC2B9H11 (3) have been synthesised by simple metallation of [7,9-nido-C2B 9H11]2- and [2,9-nido-C2B 9H11]2-, respectively. In preparing the known cobaltacarborane 2-(?-C5H5)-2,1,12-closo-CoC 2B9H11 (6), the new bis(dicarbollide) [2,2'-Co(1,12-closo-C2B9H11)2] - (as its [(?-C5H5)2Co] + salt; 7) was also formed. Molecular structures of 2, 3, 6 and 7 and that of the known compound 2-(?-C5H5)-2,1,7-closo- CoC2B9H11 (5) have been determined. Patterns in 11B)>, the weighted average 11B NMR chemical shift, of these metallacarboranes, together with those in 3-(p-cymene)-3,1,2-closo-RuC2B9H11 (1) and 3-(?-C5H5)-3,1,2-closo-CoC2B 9H11 (4) are discussed in relation to in the parent carboranes 1,2-closo-C2B10H12, 1,7-closo-C2B10H12 and 1,12-closo-C 2B10H12. The similarity between the 1H and 11B spectra of 6 and 7 confirm the isolobality of the [C5H 5]- and [C2B9H11] 2- ligands. An electrochemical study of 7 confirms that trends in the potential of the CoIII/CoII couple for the series of isomers of (?-C5H5)CoC2B9H 11 are reproduced for the bis(dicarbollides) [Co(C2B 9H11)2]-. The molecular structures of compounds 1-3 as a family and 4-6 as a family provide a unique opportunity to consider structural patterns in simple isomeric metallacarboranes. © 2010 Institute of Organic Chemistry and Biochemistry.
AB - The ruthenacarboranes 2-(p-cymene)-2,1,7-closo-RuC2B 9H11 (2) (p-cymene = 1-methyl-4-isopropylbenzene) and 2-(p-cymene)-2,1,12-closo-RuC2B9H11 (3) have been synthesised by simple metallation of [7,9-nido-C2B 9H11]2- and [2,9-nido-C2B 9H11]2-, respectively. In preparing the known cobaltacarborane 2-(?-C5H5)-2,1,12-closo-CoC 2B9H11 (6), the new bis(dicarbollide) [2,2'-Co(1,12-closo-C2B9H11)2] - (as its [(?-C5H5)2Co] + salt; 7) was also formed. Molecular structures of 2, 3, 6 and 7 and that of the known compound 2-(?-C5H5)-2,1,7-closo- CoC2B9H11 (5) have been determined. Patterns in 11B)>, the weighted average 11B NMR chemical shift, of these metallacarboranes, together with those in 3-(p-cymene)-3,1,2-closo-RuC2B9H11 (1) and 3-(?-C5H5)-3,1,2-closo-CoC2B 9H11 (4) are discussed in relation to in the parent carboranes 1,2-closo-C2B10H12, 1,7-closo-C2B10H12 and 1,12-closo-C 2B10H12. The similarity between the 1H and 11B spectra of 6 and 7 confirm the isolobality of the [C5H 5]- and [C2B9H11] 2- ligands. An electrochemical study of 7 confirms that trends in the potential of the CoIII/CoII couple for the series of isomers of (?-C5H5)CoC2B9H 11 are reproduced for the bis(dicarbollides) [Co(C2B 9H11)2]-. The molecular structures of compounds 1-3 as a family and 4-6 as a family provide a unique opportunity to consider structural patterns in simple isomeric metallacarboranes. © 2010 Institute of Organic Chemistry and Biochemistry.
KW - Boron clusters
KW - Carboranes
KW - Cobalt
KW - Crystallography
KW - Electrochemistry
KW - Metallacarboranes
KW - Ruthenium
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=77957069919&partnerID=8YFLogxK
U2 - 10.1135/cccc2010063
DO - 10.1135/cccc2010063
M3 - Article
SN - 0010-0765
VL - 75
SP - 853
EP - 869
JO - Collection of Czechoslovak Chemical Communications
JF - Collection of Czechoslovak Chemical Communications
IS - 8
ER -