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Syntheses and Characterization of Organoimido Complexes of Niobium(V); Potential CVD Precursors
Author(s) -
Chiu HsinTien,
Lin JyhCherng,
Chuang ShiowHuey,
Lee GeneHsiang,
Peng ShieMing
Publication year - 1998
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199800056
Subject(s) - chemistry , monoclinic crystal system , crystallography , octahedron , pyridine , bond length , niobium , crystal structure , ligand (biochemistry) , molecular geometry , stereochemistry , molecule , medicinal chemistry , biochemistry , receptor , organic chemistry
New niobium imido complexes (RN)Nb(NEt 2 ) 3 (R = Pr n , Pr i and Bu t ), potential precursors to grow niobium containing thin films by chemical vapor deposition (CVD), were prepared by reacting the corresponding (RN)NbCl 3 py 2 complexes (R = Pr n , Pr i and Bu t ; py = pyridine) with LiNEt 2 in hydrocarbon solvents. The structures of (RN)NbCl 3 py 2 (R = Pr i and Bu t ), determined by X‐ray crystallography, are mononuclear with distorted octahedral geometries, For each complex, three chloride ligands are cis to the imido ligand and occupy meridional positions. One of two py ligands is cis to and the other is trans to the imido ligand. For (Pr i N)NbCl 3 py 2 , the Nb=NPr i bond distance (Å) is 1.733(3) and the ∠Nb=N‐Pr i angle (°) is 178.0(3). Crystal data: monoclinic, space group P2 1 /n, a = 8.805(2), b = 14.930(4), c = 13, 407(3) Å, β = 93.37(2)°, V = 1759.5(7) Å 3 , Z = 4, D c = 1.565 g cm 3 . For (Bu t N)NbCl 3 py 2 , the Nb=NBu t bond distance (Å) is 1.734(4) and the ∠Nb=N‐Bu l angle (°) is 174.8(4). Crystal data: monoclinic, space group P2 1 /c, a = 9.609(1), b = 13.591(6), c = 14.615(2) Å, β = 90.05(1)°, V = 1908.5(9) Å 3 , Z = 4, D c = 1.492 g cm −3 .