871246-39-8

Upstream product

• 52594-52-2 dimethyl(2,2'-bipyridine)platinum(II) 
• 201230-82-2 carbon monoxide 

Relevant academic research and scientific papers

Comparative studies with zwitterionic platinum(II) bis(pyrazolyl)borate and 2,2′-bipyridylborate complexes

A comparison between the mononuclear platinum complexes of three structurally different monoanionic borato ligands is presented: [Ph 2(pyrazolyl)2]- ([Ph2B(pz) 2], 1), [4-Ph3B(2,2′-bipyridine)]- ([(4-BPh3)bpy], 2), and [Ph2B(CH2PPh 2)2]- ([Ph2BP2], 3). The new bipyridylborate ligand 2 is introduced in this study. The relative trans influence of these ligands has been assessed by comparison of the structural and spectroscopic (NMR) data of the platinum dimethyl complexes [[Ph 2B(pz)2]Pt(Me)2][NBu4] (4), [[(4-BPh3)bpy]Pt(Me)2] [NBu4] (5), and [[Ph2BP2]Pt(Me)2][ASN] (6). The neutral complexes [Ph2B(pz)2]Pt(Me)(NCCH3) (7), [Ph2B(pz)2]Pt(Me)(CO) (8), [Ph2B(pz) 2]Pt(Me)(P(C6F5)3) (9), [(4-BPh 3)bpy]Pt(Me)(NCCH3) (10), [(4-BPh3)bpy]Pt(Me) (CO) (11), and [(bpy)Pt(Me)(CO)] [BPh4] (12) were prepared, and the carbonyl complexes 8, 11, and 12 provide information pertaining to the relative electronreleasing character of each ligand type. The CO stretching frequencies suggest that the charged borate moiety renders the borato ligands more electron-donating than their neutral analogues. Of the neutral platinum methyl solvento complexes supported by ligands 1, 2, and 3, only those of 1 display very different C - H activation propensities. Upon protonation or methide abstraction in benzene at room temperature, complex 4 rapidly activates two molecules of benzene to generate [[Ph2B(pz)2]Pt(Ph) 2][NBu4] (13). Isotopic scrambling of deuterium into methane in C6D6 solvent suggests the intermediacy of a methane oadduct in this reaction. The double C-H activation reaction can be halted by addition of acetonitrile to trap the intermediate [Ph 2B(pz)2]Pt(Ph)(NCCH3) (14). Complex 3 also displays reactivity toward the benzylic C-H bonds of mesitylene at room temperature to form [Ph2(pz)2]-Pt(pzH)(CH 2C6H3(CH3)2) (15) in modest yield.