Bis(2,2'-bipyridyl)diisopropoxymolybdenum(II). Structural and spectroscopic evidence for molybdenum-to-bipyridyl .pi.* bonding

Chisholm, M. H.; Huffman, John C.; Rothwell, Ian P.; Bradley, Philip; Kreß, Nico; Woodruff, William H.

doi:10.1021/ja00406a048

Cited by 172 publications

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“…[1][2][3][4][5][6][7][8][9] Studies on structure of bipyridine derivatives are also indicate an enormous amount of research affords. A low temperature X-ray structure, 10 the theoretical calculations [11][12][13][14][15] and spectroscopic studies of bipyridine derivatives have been reported in the literature. 16 Chemical reaction studies of the various bipyridines are numerous.…”

Section: Introductionmentioning

confidence: 99%

Quantum chemical studies on acidity-basicity behaviors of some bipyridine derivatives

Öğretır¹,

Öztürk²,

Tay³

2010

Arkivoc

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Section: Introductionmentioning

confidence: 99%

Quantum chemical studies on acidity-basicity behaviors of some bipyridine derivatives

Öğretır¹,

Öztürk²,

Tay³

2010

Arkivoc

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“…These studies were preceded by the synthesis of octahedral tertbutoxide complexes by Chisholm et al as ( t BuO) 2 Mo-(py) 2 (CO) 2 33 and ( t BuO) 2 Mo(bipy) 2 . 34 Thiolates have also seen activity as ligands compatible with Mo(II) centers, but these t BuS -, 35,36 2,6-Ph 6 -C 6 H 3 S -, and 2,4,6-i PrC 6 H 2 S -37 compounds all possess higher coordination numbers than four.…”

Section: Discussionmentioning

confidence: 99%

Four-Coordinate Mo(II) as (silox)₂Mo(PMe₃)₂and Its W(IV) Congener (silox)₂HW(η²-CH₂PMe₂)(PMe₃) (silox =^tBu₃SiO)

Kuiper¹,

Wolczanski²,

Lobkovsky³

et al. 2008

Inorg. Chem.

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The reduction of [( t Bu3SiO)2MoCl]2 (2 2) provided the cyclometalated derivative, (silox)2HMoMo(κ-O,C-OSi t Bu2CMe2CH2)(silox) (3), and alkylation of 2 2 with MeMgBr afforded [( t Bu3SiO)2MoCH3]2 (4 2). The hydrogenation of 4 2 was ineffective, but the reduction of 2 2 under H2 generated [( t Bu3SiO)2MoH]2 (5 2), and the addition of 2-butyne to 3 gave [(silox)2Mo]2(μ:η2η2-C2Me2) (6), thereby implicating the existence of [(silox)2Mo]2 (1 2). The addition of (silox)H to Mo(NMe2)4 led to (silox)2Mo(NMe2)2 (7), but further elaboration of the core proved ineffective. The silanolysis of MoCl5 afforded (silox)2MoCl4 (8) and (silox)3MoCl3 (9) as a mixture from which pure 8 could be isolated, and the addition of THF or PMe3 resulted in derivatives of 9 as (silox)2Cl3MoL (L = THF, 10; PMe3, 11). Reductions of 11 and (silox)2WCl4 (15) in the presence of excess PMe3 provided (silox)2Cl2MPMe3 (M = Mo, 12; W, 16) or (silox)2HW(η2-CH2PMe2)PMe3 (14). While “(silox)2W(PMe3)2” was unstable with respect to W(IV) as 14, a reduction of 12 led to the stable Mo(II) diphosphine, (silox)2Mo(PMe3)2 (17). X-ray crystal structures of 10 (pseudo-O h ), 12 (square pyramidal), and 14 and 17 (distorted T d ) are reported. Calculations address the diamagnetism of 12 and 16, and the distortion of 17 and its stability to cyclometalation in contrast to 14.

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“…* Related literature. Chisholm, Huffman, Rothwell, Bradley, Kress & Woodruff (1981); James & Williams (1973); Kvick (1976); Newkome, Taylor, Fronczek & Delord (1984).…”

Section: Bond Distances (A) Angles (O) and Torsion Angles (°)mentioning

confidence: 99%

Structure of a 2,2'-bipyridine containing dioxolane and 6-bromopyridine subunits

Fronczek¹,

Taylor²,

Gupta³

et al. 1985

Acta Crystallogr C

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Bis(2,2'-bipyridyl)diisopropoxymolybdenum(II). Structural and spectroscopic evidence for molybdenum-to-bipyridyl .pi.* bonding

Cited by 172 publications

References 0 publications

Quantum chemical studies on acidity-basicity behaviors of some bipyridine derivatives

Quantum chemical studies on acidity-basicity behaviors of some bipyridine derivatives

Four-Coordinate Mo(II) as (silox)₂Mo(PMe₃)₂and Its W(IV) Congener (silox)₂HW(η²-CH₂PMe₂)(PMe₃) (silox =^tBu₃SiO)

Structure of a 2,2'-bipyridine containing dioxolane and 6-bromopyridine subunits

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Bis(2,2'-bipyridyl)diisopropoxymolybdenum(II). Structural and spectroscopic evidence for molybdenum-to-bipyridyl .pi.* bonding

Cited by 172 publications

References 0 publications

Quantum chemical studies on acidity-basicity behaviors of some bipyridine derivatives

Quantum chemical studies on acidity-basicity behaviors of some bipyridine derivatives

Four-Coordinate Mo(II) as (silox)2Mo(PMe3)2and Its W(IV) Congener (silox)2HW(η2-CH2PMe2)(PMe3) (silox =tBu3SiO)

Structure of a 2,2'-bipyridine containing dioxolane and 6-bromopyridine subunits

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Four-Coordinate Mo(II) as (silox)₂Mo(PMe₃)₂and Its W(IV) Congener (silox)₂HW(η²-CH₂PMe₂)(PMe₃) (silox =^tBu₃SiO)