880870-89-3

Upstream product

• 880870-88-2 [Nb(η5-C5H4SiMe3)2(κ1-SC(S)PPh2)(CO)] 
• 901769-70-8 [Nb(η5-C5H4SiMe3)2(κ1-S-SC(S)(PPh2))(CNBu(n))] 
• 901769-71-9 [Nb(η5-C5H4SiMe3)2(κ1-S-SC(S)(PPh2))(CNCy)] 
• 901769-72-0 [Nb(η5-C5H4SiMe3)2(κ1-S-SC(S)(PPh2))(CNXylyl)] 

Relevant academic research and scientific papers

Synthesis, characterization, and reactivity of isocyanidephosphidoniobocene derivatives: X-ray diffraction structures of new isocyanideniobocene complexes, [Nb(η5-C5H 4SiMe3)2(CNR)(PMePh2)]I, R = Xylyl, Cy

The reaction of the hydride niobocene complexes [Nb(η 5-C5H4SiMe3)2H(L)] [L = CNBun (1), CNCy (2), and CNXylyl (3)] with ClPPh2 yielded the cationic niobocene complexes [Nb(η5-C5H 4SiMe3)2(PHPh2)-(L)]Cl [L = CNBun (4), CNCy (5), and CNXylyl (6)]. Treatment of these complexes with NaOH yielded a new family of phosphidoniobocene derivatives [Nb(η 5-C5H4SiMe3)2(PPh 2)(L)] [L = CNBun (7), CNCy (8), and CNXylyl (9)] by elimination of the hydrogen atom directly bonded to the phosphorus. The cationic d2 species [Nb(η5-C5H 4SiMe3)2(PRPh2)(L)]X [R = Me, X = I, L = CNBun (10), CNCy (11), and CNXylyl (12); R = CH2Ph, X = Br, CNBun (13), CNCy (14), and CNXylyl (15); R = CH 2CH2Ph, X = Br, CNBun (16), CNCy (17), and CNXylyl (18)] were prepared by the reaction of alkyl halides RX (R = Me, X = I; CH2Ph, X = Br; CH2CH2Ph, X = Br) with 7, 8, or 9 by electrophilic attack on the phosphorus atom present in the phosphide terminal ligand. In the same way, the reaction of 9 with ICH2CH 2I or iodine yielded the complex [Nb(η5-C 5H4SiMe3)2(P(I)Ph 2)(CNXylyl)]I3 (19). The insertion reaction of carbon disulfide into the Nb-P bond of 7, 8, or 9 yielded a new family of diphenylphosphidodithioformato complexes with the niobocene system [Nb(η5-C5H4SiMe3) 2(κ1-S-SC(S)(PPh2))(L)] [L = CNBu n (20), CNCy (21), and CNXylyl (22)]. The molecular structures of 11 and 12 were determined by single-crystal X-ray diffraction studies.

Reactivity of a phosphido-niobocene derivative toward CS2 and alkyl halides to give phosphinodithioformato- and phosphino-niobocene complexes: X-ray crystal structures of [Nb(η5-C5H 4SiMe3)2(κ1-S-SC(S)(PPh 2))(CO)]

The reaction of the niobocene complex [Nb(η5-C 5H4SiMe3)2(PHPh2)(CO)]Cl (1) with NaOH yielded the corresponding phosphidoniobocene derivative [Nb(η5-C5H4SiMe3) 2(PPh2)(CO)] (2) by deprotonation of the P-H bond. The subsequent insertion reaction of carbon disulfide into the Nb-P bond yielded the first examples of a diphenylphosphinodithioformato ligand coordinated to the niobocene system by giving [Nb(η5-C5H 4SiMe3)2(κ1-S-SC(S)(PPh 2))(CO)] (3) and [Nb(η5-C5H 4SiMe3)2(κ2-S,S-SC(S)(PPh 2))] (4); the latter compound can also be prepared by the corresponding CO elimination of 3. The cationic d2 species [Nb(η5-C5H4SiMe3) 2(PRPh2)(CO)]X (R = Me, X = I (5); CH2Ph, X = Br (6); CH2CH2Ph, X = Br (7)) were prepared by the reaction of alkyl halides RX (R = Me, X = I; CH2Ph, X = Br; CH 2CH2Ph, X = Br) with 2 by electrophilic attack on the phosphorus atom present in the phosphido terminal ligand. In the same way, the reaction of 2 with ICH2CH2I yielded the complex [Nb(η5-C5H4SiMe3) 2(P(I)Ph2)(CO)]-I3 (8). The molecular structures of 3 and 8 were determined by single-crystal X-ray diffraction studies.