Oxidative cleavage of dimethylstannaundecaborane: preparation and structural characterization of 5,10-dibromodecaborane(14)

Electrophilic Methylation of Decaborane(14): Selective Synthesis of Tetramethylated and Heptamethylated Decaboranes and Their Conjugated Bases

“…In the current area, only one alkylated structure of 1 is available, namely, 1-Et- nido -B 10 H 13 . In addition to that, the list of iodo, and/or other halogeno (X) and trifluoromethylsulfonyl (OSO 2 CF 3 ), derivatives of 1 is limited to a few examples, e.g., the substituted lowest rim of 1 (i.e., I bonded either to B1 or to B2) − and the substituted upper rim of 1 (i.e., H in B6 and/or B9 positions substituted with X or OSO 2 CF 3 , , and Br bonded to B5 and B10). , In view of the recent permethylation or persubstitution methods reported by our − or other − laboratories, we have now tried to extend these synthetic strategies to compound 1 , a key species of the borane series, also taking into account that the methylation of the boron clusters usually provides more stable species suitable for further examinations.…”

Decaborane: From Alfred Stock and Rocket Fuel Projects to Nowadays

“…The 6-bromo derivative [6-Br-B10H13] was also obtained by the reaction of (NH4)2[closo-B10H10] with AlBr3, followed by the hydrolysis of the resulting intermediate [188]. The reaction of dimethylstannaundecaborane [nido-Me2SnB10H12] with bromine in carbon disulfide leads to the oxidative removal of tin with the formation of the 5,10dibromo derivative of decaborane [5,10-Br2-B10H12] (Figure 6) [191]. The reaction of decaborane (14) with chlorine in dichloromethane in the presence of AlCl3 results in a mixture of the 1-and 2-chloro derivatives of decaborane [1-Cl-B10H13] and [2-Cl-B10H13] [174,189].…”

“…Unexpectedly, a mixture of the 1-and 2-chloro derivatives of decaborane was obtained in the reaction of decaborane( 14) with 1,1-difluoroethane in carbon disulfide in the presence of AlCl3 [192]. The isomers were separated by fractional The reaction of dimethylstannaundecaborane [nido-Me 2 SnB 10 H 12 ] with bromine in carbon disulfide leads to the oxidative removal of tin with the formation of the 5,10-dibromo derivative of decaborane [5,10-Br 2 -B 10 H 12 ] (Figure 6) [191].…”

Main-group Heteroboranes

“…The nido 11-vertex derivatives 7-Me 2 MB 10 H 12 (M = Ge or Sn) have been prepared by reaction of NaB 10 H 13 with Me 2 MCl 2 . 25 The salt (Ph 4 As) 2 B 10 H 12 reacted with SnCl 2 and Me 2 SnCl 2 to give (Ph 4 As) 2 B 10 H, 2 SnCl 2 and (Ph 4 As) 2 B 10 H 12 SnMe 2 Cl 2 , respectively. 26 The lI9 Sn Mossbauer isomer shifts suggest that these dianions contain tin(II) and tin(IV), respectively.…”

“…Reaction of Cs[6-SB 9 H 12 ] with [(r|-Cp*)RhCl 2 ] 2 formed l-S-2,3-[(r|-Cp*)Rh] 2 -7-ClB 9 H 8 (25) and a number o f other unidentified colored products. 100 An x-ray structural determination of (25) illustrated by the schematic structure of Figure 1 3 shows this complex to be a closo 12-vertex cluster with the chlorine atom bonded to the boron atom adjacent to both rhodium atoms.…”