Linking metal centres with bis(diphenylphosphino)acetylene (DPPA): Syntheses and molecular structures of [{Mo(CO)4(μ-DPPA)}2] and [{Mo(CO)3}2(μ-DPPA)3]

Synthesis and reactivity of ditungsten helical complex W2(CO)6(μ-Ph2PCCPPh2)3

“…6) 24.78. The related helical tris(dppa) complexes are Ni 2 (CO) 2 (dppa) 3 [16], [Ag 2 (dppa) 3 ] 2' [17], Mo 2 (CO) 6 (dppa) 3 [12] and (BuTe) 2 Cu 2 (dppa) 3 [18]. There are substantially intramolecular aromatic contacts between the 12 phenyl groups, as shown in Fig.…”

Synthesis and reactivity of ditungsten helical complex W2(CO)6(μ-Ph2PCCPPh2)3

“…6) 24.78. The related helical tris(dppa) complexes are Ni 2 (CO) 2 (dppa) 3 [16], [Ag 2 (dppa) 3 ] 2' [17], Mo 2 (CO) 6 (dppa) 3 [12] and (BuTe) 2 Cu 2 (dppa) 3 [18]. There are substantially intramolecular aromatic contacts between the 12 phenyl groups, as shown in Fig.…”

The synthesis and structural characterization of linear and macrocyclic bis(dinitrosyliron) complexes supported by bis(phosphine) bridging ligands

“…Upon viewing the structure of 9 down the Fe-Fe vector, it is evident that the DPPA ligands can be loosely classified as "staggered" (P(1)-C(1)-C(2)-P(2)) and "eclipsed" (P(3)-C(3)-C(4)-P(4)), with the former experiencing greater strain and subsequently more pronounced deviation from linearity than the latter. It is interesting to note that although Mo 2 (µ-DPPA) 2 (CO) 8 possesses similarly "staggered" and "eclipsed" DPPA ligands (36), a correlation between the degree of nonlinearity of the DPPA ligands and their relative orientation does not exist in this Mo-based system.…”

“…Despite the range in N-Fe-N angles (115.6(4)°to 126.5(4)°), all eight of the Fe(NO) 2 units in compounds 4, 5, 8, and 9 exhibit "attracto" conformations (N-Fe-N > O-Fe- The overall molecular structure of the macrocyclic DPPA compound, 9, can be described as a severely twisted tenmembered ring, a geometry that is similar to Mo 2 (µ-DPPA) 2 (CO) 8 (36), but different from the nearly planar structure found for PdPtCl 4 (µ-DPPA) 2 (37). The puckering of the ring framework in 9 gives rise to a "bow-tie" orientation of the alkyne units, in which these fragments are twisted by approximately 49°with respect to one another (Fig.…”

Syntheses and structural characterization of dicopper(I) bis(diphenylphosphino)acetylene complexes containing tricyclic, cyclic and linear frameworks

“…1, which consists of two (MeNC)Cu + groups bridged by three dppa ligands. The coordination about the Cu + ion can be described as a distorted tetrahedral, such that the P-Cu-P angles range from 103.01(4)°to 116.85(4)°and the N-Cu-P angles range from 108.8(1)°to [19], Mo 2 (CO) 6 (dppa) 3 [14], W 2 (CO) 6 (dppa) 3 [16], Cu 2 (X) 2 (dppa) 3 (X = TeBu, SSiMe 3 ) [20,21], [Ag 2 (dppa) 3 ] + [22] and Au 2 (dppa) 3 Cl 2 [23].…”

Synthesis and reactivity of ditungsten helical complex W2(CO)6(μ-Ph2PCCPPh2)3

“…6) 24.78. The related helical tris(dppa) complexes are Ni 2 (CO) 2 (dppa) 3 [16], [Ag 2 (dppa) 3 ] 2' [17], Mo 2 (CO) 6 (dppa) 3 [12] and (BuTe) 2 Cu 2 (dppa) 3 [18]. There are substantially intramolecular aromatic contacts between the 12 phenyl groups, as shown in Fig.…”

The synthesis and structural characterization of linear and macrocyclic bis(dinitrosyliron) complexes supported by bis(phosphine) bridging ligands

“…Upon viewing the structure of 9 down the Fe-Fe vector, it is evident that the DPPA ligands can be loosely classified as "staggered" (P(1)-C(1)-C(2)-P(2)) and "eclipsed" (P(3)-C(3)-C(4)-P(4)), with the former experiencing greater strain and subsequently more pronounced deviation from linearity than the latter. It is interesting to note that although Mo 2 (µ-DPPA) 2 (CO) 8 possesses similarly "staggered" and "eclipsed" DPPA ligands (36), a correlation between the degree of nonlinearity of the DPPA ligands and their relative orientation does not exist in this Mo-based system.…”

“…Despite the range in N-Fe-N angles (115.6(4)°to 126.5(4)°), all eight of the Fe(NO) 2 units in compounds 4, 5, 8, and 9 exhibit "attracto" conformations (N-Fe-N > O-Fe- The overall molecular structure of the macrocyclic DPPA compound, 9, can be described as a severely twisted tenmembered ring, a geometry that is similar to Mo 2 (µ-DPPA) 2 (CO) 8 (36), but different from the nearly planar structure found for PdPtCl 4 (µ-DPPA) 2 (37). The puckering of the ring framework in 9 gives rise to a "bow-tie" orientation of the alkyne units, in which these fragments are twisted by approximately 49°with respect to one another (Fig.…”

Syntheses and structural characterization of dicopper(I) bis(diphenylphosphino)acetylene complexes containing tricyclic, cyclic and linear frameworks

“…1, which consists of two (MeNC)Cu + groups bridged by three dppa ligands. The coordination about the Cu + ion can be described as a distorted tetrahedral, such that the P-Cu-P angles range from 103.01(4)°to 116.85(4)°and the N-Cu-P angles range from 108.8(1)°to [19], Mo 2 (CO) 6 (dppa) 3 [14], W 2 (CO) 6 (dppa) 3 [16], Cu 2 (X) 2 (dppa) 3 (X = TeBu, SSiMe 3 ) [20,21], [Ag 2 (dppa) 3 ] + [22] and Au 2 (dppa) 3 Cl 2 [23].…”

Synthesis and reactivity of ditungsten helical complex W2(CO)6(μ-Ph2PCCPPh2)3

“…6) 24.78. The related helical tris(dppa) complexes are Ni 2 (CO) 2 (dppa) 3 [16], [Ag 2 (dppa) 3 ] 2' [17], Mo 2 (CO) 6 (dppa) 3 [12] and (BuTe) 2 Cu 2 (dppa) 3 [18]. There are substantially intramolecular aromatic contacts between the 12 phenyl groups, as shown in Fig.…”

The synthesis and structural characterization of linear and macrocyclic bis(dinitrosyliron) complexes supported by bis(phosphine) bridging ligands

“…Upon viewing the structure of 9 down the Fe-Fe vector, it is evident that the DPPA ligands can be loosely classified as "staggered" (P(1)-C(1)-C(2)-P(2)) and "eclipsed" (P(3)-C(3)-C(4)-P(4)), with the former experiencing greater strain and subsequently more pronounced deviation from linearity than the latter. It is interesting to note that although Mo 2 (µ-DPPA) 2 (CO) 8 possesses similarly "staggered" and "eclipsed" DPPA ligands (36), a correlation between the degree of nonlinearity of the DPPA ligands and their relative orientation does not exist in this Mo-based system.…”

“…Despite the range in N-Fe-N angles (115.6(4)°to 126.5(4)°), all eight of the Fe(NO) 2 units in compounds 4, 5, 8, and 9 exhibit "attracto" conformations (N-Fe-N > O-Fe- The overall molecular structure of the macrocyclic DPPA compound, 9, can be described as a severely twisted tenmembered ring, a geometry that is similar to Mo 2 (µ-DPPA) 2 (CO) 8 (36), but different from the nearly planar structure found for PdPtCl 4 (µ-DPPA) 2 (37). The puckering of the ring framework in 9 gives rise to a "bow-tie" orientation of the alkyne units, in which these fragments are twisted by approximately 49°with respect to one another (Fig.…”

Syntheses and structural characterization of dicopper(I) bis(diphenylphosphino)acetylene complexes containing tricyclic, cyclic and linear frameworks

“…1, which consists of two (MeNC)Cu + groups bridged by three dppa ligands. The coordination about the Cu + ion can be described as a distorted tetrahedral, such that the P-Cu-P angles range from 103.01(4)°to 116.85(4)°and the N-Cu-P angles range from 108.8(1)°to [19], Mo 2 (CO) 6 (dppa) 3 [14], W 2 (CO) 6 (dppa) 3 [16], Cu 2 (X) 2 (dppa) 3 (X = TeBu, SSiMe 3 ) [20,21], [Ag 2 (dppa) 3 ] + [22] and Au 2 (dppa) 3 Cl 2 [23].…”