“…The amido Al(1)−N(1) distance is slightly shorter than the imine Al(1)−N(8) bond (1.902(4) Å) and the other pyridyl Al−N bond, indicating that the negatively charged amido nitrogen atom is a stronger donor to the aluminum center than the neutral imine nitrogen atom. The Al(1)−S(10*) distance (2.326(2) Å) is comparable to that observed for the thiolate compound, AlH(SCH 2 CH 2 NEt 2 ) 2 (2.271(1) Å), the cubane compound, [( t Bu)Al(μ 3 -S)] 4 (2.316(9) Å), and the bridged sulfur compound, [AlMe 2 (μ-SC 6 F 5 )] 2 (2.405 Å) …”
Section: Resultssupporting
confidence: 61%
“…As shown in Figure 1 (2.316(9) Å), 16 and the bridged sulfur compound, [AlMe 2 (µ-SC 6 F 5 )] 2 (2.405 Å). 17 The Al(1)-C(15) bond distance (1.944(6) The proximity of the amido nitrogen atom to the aluminum atom appears to be the reason for the asymmetric arrangement. The imine N(8)-C(9) bond distance (1.362(6) Å) is indicative of some double-bond character.…”
Novel tetranuclear metal complexes with the formula
[(MeM){NC4H3CHNNC(S)NR}(MMe2
)]2 (M = Al, R =
i
C3H7 (1); M
= Ga, R =
i
C3H7
(2); M = Al, R = Me (3); M = Ga, R = Me
(4))
result when pyrrolecarboxaldehyde thiosemicarbazone ligands are mixed
with trimethylaluminum and -gallium. Four dinuclear metal compounds with the
formula
(MMe2)2[SC4H3CHNNC(S)NR] (M = Al, R =
i
C3H7 (5); M
= Ga, R =
i
C3H7
(6); M = Al, R = C6H5
(7); M =
Ga, R = C6H5 (8)) were synthesized
by the methane elimination reaction of thiophenecarboxaldehyde thiosemicarbazones with trimethylaluminum and -gallium.
The X-ray crystal
structures of 1 and 8 are described. The
structural data revealed that 1 is a
tetranuclear
aluminum compound with an eight-membered ring system and 8
is a dinuclear gallium
compound with a weak interaction between the pendant thiophene and the
gallium center.
“…The amido Al(1)−N(1) distance is slightly shorter than the imine Al(1)−N(8) bond (1.902(4) Å) and the other pyridyl Al−N bond, indicating that the negatively charged amido nitrogen atom is a stronger donor to the aluminum center than the neutral imine nitrogen atom. The Al(1)−S(10*) distance (2.326(2) Å) is comparable to that observed for the thiolate compound, AlH(SCH 2 CH 2 NEt 2 ) 2 (2.271(1) Å), the cubane compound, [( t Bu)Al(μ 3 -S)] 4 (2.316(9) Å), and the bridged sulfur compound, [AlMe 2 (μ-SC 6 F 5 )] 2 (2.405 Å) …”
Section: Resultssupporting
confidence: 61%
“…As shown in Figure 1 (2.316(9) Å), 16 and the bridged sulfur compound, [AlMe 2 (µ-SC 6 F 5 )] 2 (2.405 Å). 17 The Al(1)-C(15) bond distance (1.944(6) The proximity of the amido nitrogen atom to the aluminum atom appears to be the reason for the asymmetric arrangement. The imine N(8)-C(9) bond distance (1.362(6) Å) is indicative of some double-bond character.…”
Novel tetranuclear metal complexes with the formula
[(MeM){NC4H3CHNNC(S)NR}(MMe2
)]2 (M = Al, R =
i
C3H7 (1); M
= Ga, R =
i
C3H7
(2); M = Al, R = Me (3); M = Ga, R = Me
(4))
result when pyrrolecarboxaldehyde thiosemicarbazone ligands are mixed
with trimethylaluminum and -gallium. Four dinuclear metal compounds with the
formula
(MMe2)2[SC4H3CHNNC(S)NR] (M = Al, R =
i
C3H7 (5); M
= Ga, R =
i
C3H7
(6); M = Al, R = C6H5
(7); M =
Ga, R = C6H5 (8)) were synthesized
by the methane elimination reaction of thiophenecarboxaldehyde thiosemicarbazones with trimethylaluminum and -gallium.
The X-ray crystal
structures of 1 and 8 are described. The
structural data revealed that 1 is a
tetranuclear
aluminum compound with an eight-membered ring system and 8
is a dinuclear gallium
compound with a weak interaction between the pendant thiophene and the
gallium center.
“…for C 8 3.45 (sept, 3 J = 6.6 Hz, 1H, CH), 6.24 (s, 5H, C 5 H 5 ); (CDCl 3 , d, ppm) 1.35 (d, 3 J = 6.6 Hz, 6H, CH 3 ), 3.46 (sept, 1H, CH), 6.26 (s, 5H, C 5 H 5 ). 13 (CH), 113.56 (C 5 H 5 ).…”
Section: Synthesis Of [Cp(cl)al(l-s I Pr)] 2 (4)mentioning
confidence: 99%
“…Among these compounds aluminum alkoxides have been the most systematically and broadly examined (see for example [2]). Comparing to aluminum alkoxides the chemistry of thiolate derivatives is rather scant [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The structures of organoaluminum thiolates are diversified and the factors controlling them are not still definitely examined.…”
“…The Al᎐(µ-Se) distances are uniform across the three complexes, 2.344( 2 52 It is also shorter than that in the four-co-ordinate dinuclear thiolato complex [{AlMe 2 -(µ-SC 6 F 5 )} 2 ], 2.405(8) Å. 53 The Al᎐Se (terminal) distance in trans-[{Al(µ-Se)(SePh)(NMe 3 )} 2 ] is significantly longer than the Al᎐Se distances in the Al 2 Se 2 core, but comparable with the upper limit observed in [Al(SePh) 3 (NMe 3 )], and is considerably shorter than that in the dinuclear complex [{Al(mes) 2 -(µ-SeMe)} 2 ], 2.519(2) Å. 8 The Al᎐Te (terminal) distance is slightly elongated compared to Al᎐Te in trans-[{AlH-(µ-Te)(NMe 3 )} 2 ], 2.586(4) and 2.580(4) Å, and [Al(TePh) 3 -(NMe 3 )], 2.581(2)-2.589(2) Å, but shorter than in [{AlBu t 2 -(µ-TeBu t )} 2 ], 2.732(3) Å.…”
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