139042-55-0

Basic information

• Product Name: (η5-C5Me5)2Hf(NH(2,4,6-Me3C6H2))2
• CAS NO: 139042-55-0
• Molecular Weight: 717.35
• Mol File: 139042-55-0.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: (η5-C5Me5)2Hf(NH(2,4,6-Me3C6H2))2(CAS DataBase Reference)
• NIST Chemistry Reference: (η5-C5Me5)2Hf(NH(2,4,6-Me3C6H2))2(139042-55-0)
• EPA Substance Registry System: (η5-C5Me5)2Hf(NH(2,4,6-Me3C6H2))2(139042-55-0)

Safety Data

• Hazardous Substances Data: 139042-55-0(Hazardous Substances Data)

Upstream product

• 85959-83-7 bis(1,2,3,4,5-pentamethylcyclopentadienyl)hafnium dichloride 
• 65768-38-9 lithium 2,4,6-trimethylaniline 

Relevant articles and documents

Synthesis and Structures of (Monoorganyl)amides and -imides of Zirconium and Hafnium

The tetrahalides MCl4 (M = Zr 1a, Hf 1b) react with LiNHtBu with elimination of LiCl to yield 2 (3) (M = Zr 3a, Hf 3b).Compounds 3 are thermally instable and oligomerise above 100 deg C with elimination of H2NtBu.The reactions of (η5-C5Me5)MCl3 (M = Zr 1c, Hf 1d) with LiNHR (R = tBu 2a, 2,4,6-Me3C6H2 2b, 2,6-iPr2C6H3 2c) lead to (η5-C5Me5)M(NHR)3 (4) (R = t-Bu, M = Zr 4a, Hf 4b; R = 2,4,6-Me3C6H2, M = Zr 4c, Hf 4d; R = 2,6-iPr2C6H3, M = zr 4e, Hf 4f).Compounds 4 are thermally very stable and melt without decomposition.When 1c and 1d react with LiNHPh (2d), dimers of composition 5-C5Me5)2M(NHPh)NPh>2 (M = Zr 5a, Hf 5b) are obtained.The complexes (η5-C5Me5)2M(NHR)2 (6) (M = Zr 6a, Hf 6b).Pyridine reacts with 4e at 85 deg C and replaces one molecule of 2,6-iPr2C6H3NH2 to give (η5-C5Me5)Zr(NHR)NR*Py (7).The single crystal X-ray structures of 4a, 4f, 5b and 7 are described. Key Words: Zirconium amides, imides / Hafnium amides, imides / Amides / Imides / ZrN double bond