Limits...
Crystal structures of (μ2-η(2),η(2)-4-hydroxybut-2-yn-1-yl 2-bromo-2-methylpropanoate-κ(4) C (2),C (3):C (2),C (3))bis[tricarbonylcobalt(II)](Co-Co) and [μ2-η(2),η(2)-but-2-yne-1,4-diyl bis(2-bromo-2-methyl-propanoate)-κ(4) C (2),C (3):C (2),C (3)]bis[tricarbonylcobalt(II)](Co-Co).

McAdam CJ, Moratti SC, Robinson BH, Simpson J, Stanley RG - Acta Crystallogr Sect E Struct Rep Online (2014)

Bottom Line: These combine with weak O⋯O and Br⋯O contacts to stack the mol-ecules into inter-connected columns along the b-axis direction.C-H⋯O and C-H⋯Br contacts stabilize the packing for (2), and a weak Br⋯O contact is also observed.Inter-connected columns of mol-ecules again form along the b-axis direction.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemistry, University of Otago, PO Box 56, Dunedin, New Zealand.

ABSTRACT
The title compounds, [Co2(C8H11BrO3)(CO)6], (1), and [Co2(C12H16Br2O4)(CO)6], (2), result from the replacement of two carbonyl ligands from dicobalt octa-carbonyl by the alkynes 4-hy-droxy-but-2-ynyl 2-bromo-2-methyl-propano-ate and but-2-yne-1,4-diyl bis-(2-bromo-2-methyl-propano-ate), respectively. Both mol-ecules have classic tetra-hedral C2Co2 cluster cores with the Co(II) atoms in a highly distorted octa-hedral coordination geometry. The alkyne ligands both adopt a cis-bent conformation on coordination. In the crystal structure of (1), classical O-H⋯O and non-classical C-H⋯O contacts form inversion dimers. These combine with weak O⋯O and Br⋯O contacts to stack the mol-ecules into inter-connected columns along the b-axis direction. C-H⋯O and C-H⋯Br contacts stabilize the packing for (2), and a weak Br⋯O contact is also observed. Inter-connected columns of mol-ecules again form along the b-axis direction.

No MeSH data available.


Related in: MedlinePlus

Overall packing for (1) viewed along the b axis. Hydrogen bonds and other inter­atomic contacts are drawn as dashed lines.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4120535&req=5

fig4: Overall packing for (1) viewed along the b axis. Hydrogen bonds and other inter­atomic contacts are drawn as dashed lines.

Mentions: In the crystal structure of (1), classical O1—H1⋯O3 hydrogen bonds (Table 3 ▶) are augmented by two C—H⋯O contacts that link adjacent mol­ecules into inversion dimers generating (10), (18)and (20) rings (Bernstein et al., 1995 ▶). Two additional inversion dimers also result from weaker C1—H1A⋯O1 and C8—H8A⋯O12 hydrogen bonds (Fig. 3 ▶). These contacts, together with weak O2⋯O21, [2.965 (4) Å; symmetry operation 1 + x, y, z) and Br1⋯O1 [3.307 (3) Å; symmetry operation −x, 1 − y, 2 − z] contacts stack the mol­ecules into inter­connected columns along the b-axis direction (Fig. 4 ▶).


Crystal structures of (μ2-η(2),η(2)-4-hydroxybut-2-yn-1-yl 2-bromo-2-methylpropanoate-κ(4) C (2),C (3):C (2),C (3))bis[tricarbonylcobalt(II)](Co-Co) and [μ2-η(2),η(2)-but-2-yne-1,4-diyl bis(2-bromo-2-methyl-propanoate)-κ(4) C (2),C (3):C (2),C (3)]bis[tricarbonylcobalt(II)](Co-Co).

McAdam CJ, Moratti SC, Robinson BH, Simpson J, Stanley RG - Acta Crystallogr Sect E Struct Rep Online (2014)

Overall packing for (1) viewed along the b axis. Hydrogen bonds and other inter­atomic contacts are drawn as dashed lines.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4120535&req=5

fig4: Overall packing for (1) viewed along the b axis. Hydrogen bonds and other inter­atomic contacts are drawn as dashed lines.
Mentions: In the crystal structure of (1), classical O1—H1⋯O3 hydrogen bonds (Table 3 ▶) are augmented by two C—H⋯O contacts that link adjacent mol­ecules into inversion dimers generating (10), (18)and (20) rings (Bernstein et al., 1995 ▶). Two additional inversion dimers also result from weaker C1—H1A⋯O1 and C8—H8A⋯O12 hydrogen bonds (Fig. 3 ▶). These contacts, together with weak O2⋯O21, [2.965 (4) Å; symmetry operation 1 + x, y, z) and Br1⋯O1 [3.307 (3) Å; symmetry operation −x, 1 − y, 2 − z] contacts stack the mol­ecules into inter­connected columns along the b-axis direction (Fig. 4 ▶).

Bottom Line: These combine with weak O⋯O and Br⋯O contacts to stack the mol-ecules into inter-connected columns along the b-axis direction.C-H⋯O and C-H⋯Br contacts stabilize the packing for (2), and a weak Br⋯O contact is also observed.Inter-connected columns of mol-ecules again form along the b-axis direction.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemistry, University of Otago, PO Box 56, Dunedin, New Zealand.

ABSTRACT
The title compounds, [Co2(C8H11BrO3)(CO)6], (1), and [Co2(C12H16Br2O4)(CO)6], (2), result from the replacement of two carbonyl ligands from dicobalt octa-carbonyl by the alkynes 4-hy-droxy-but-2-ynyl 2-bromo-2-methyl-propano-ate and but-2-yne-1,4-diyl bis-(2-bromo-2-methyl-propano-ate), respectively. Both mol-ecules have classic tetra-hedral C2Co2 cluster cores with the Co(II) atoms in a highly distorted octa-hedral coordination geometry. The alkyne ligands both adopt a cis-bent conformation on coordination. In the crystal structure of (1), classical O-H⋯O and non-classical C-H⋯O contacts form inversion dimers. These combine with weak O⋯O and Br⋯O contacts to stack the mol-ecules into inter-connected columns along the b-axis direction. C-H⋯O and C-H⋯Br contacts stabilize the packing for (2), and a weak Br⋯O contact is also observed. Inter-connected columns of mol-ecules again form along the b-axis direction.

No MeSH data available.


Related in: MedlinePlus