1991
DOI: 10.1039/dt9910001301
|View full text |Cite
|
Sign up to set email alerts
|

Neutral oxo and nitrido complexes of technetium(V) and rhenium(V) with an unsaturated tetradentate (N2S2) ligand. Crystal structure of [N,N′-ethylenebis(thioacetylacetonylideneiminato](2–)S,S′,N,N′) nitridotechnetium(V)

Abstract: Neutral 0 x 0 and Nitrido Complexes of Technetium(v) and Rhenium(v) with an Unsaturated Tetradentate ( N2S2) Ligand. Crystal Structure of [N,N'-Ethylenebis(thioacety1acetonylideneiminato) (2-) -S,S',N,N'] nitridotechnetium(v) t

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

3
14
0
5

Year Published

1994
1994
2019
2019

Publication Types

Select...
5
2
1

Relationship

0
8

Authors

Journals

citations
Cited by 27 publications
(22 citation statements)
references
References 42 publications
3
14
0
5
Order By: Relevance
“…A comprehensive explanation of this rate difference is not yet possible. It is, however, known that the Tc V centre can more readily accept electron density than does the Re V [50, 51] and to some extend favour, in spite of the negative charge on the NCS − as entering ligand, association with the Tc V centre. This is, however, not manifested in the activation volumes.…”
Section: Resultsmentioning
confidence: 99%
“…A comprehensive explanation of this rate difference is not yet possible. It is, however, known that the Tc V centre can more readily accept electron density than does the Re V [50, 51] and to some extend favour, in spite of the negative charge on the NCS − as entering ligand, association with the Tc V centre. This is, however, not manifested in the activation volumes.…”
Section: Resultsmentioning
confidence: 99%
“…The trans-P fashion, indeed, is retained also in some nitrido complexes of intermediate coordination number incorporating hetero bis-phosphines with a long bridge chain (eight-or sevenmembered chain including the two P atoms) such as TcNCl2(POOP) [63] or TcNCl2(PNP7), again showing that the trans-P arrangement is preferred (vide infra). As for molecules containing tetradentate ligands, such as TcN(eacyd), TcN(etaai), and TcN(tcbatsc), they usually exhibit sp geometry with an apical nitrido nitrogen atom and the basal site filled by the dianionic tetradentate ligand, in which the two identical donor S and N atoms are facing each other as imposed by the steric constrain due to the denticity of the ligand ( Figure 5) [26][27][28]. Noteworthy, when the set of coordinating atoms around the Tc≡N is formed by two π-donor and two π-acceptor atoms, as in the bis-phosphinothiolate complexes TcN(SCH 2 CH 2 PCy 2 ) 2 , TcN(SCH 2 CH 2 PPh 2 ) 2 , TcN(SCH 2 CH 2 CH 2 PTol 2 ) 2 [21,22], a distorted tbp arrangement becomes preferred.…”
Section: Five-coordinated Tc(v) Complexesmentioning
confidence: 99%
“…As for molecules containing tetradentate ligands, such as TcN(eacyd), TcN(etaai), and TcN(tcbatsc), they usually exhibit sp geometry with an apical nitrido nitrogen atom and the basal site filled by the dianionic tetradentate ligand, in which the two identical donor S and N atoms are facing each other as imposed by the steric constrain due to the denticity of the ligand ( Figure 5) [26][27][28]. As for molecules containing tetradentate ligands, such as TcN(eacyd), TcN(etaai), and TcN(tcbatsc), they usually exhibit sp geometry with an apical nitrido nitrogen atom and the basal site filled by the dianionic tetradentate ligand, in which the two identical donor S and N atoms are facing each other as imposed by the steric constrain due to the denticity of the ligand ( Figure 5) [26][27][28]. The LS complexes (Table 1) are in general heteroleptic compounds with ligands of different kinds bound to the Tc≡N group.…”
Section: Five-coordinated Tc(v) Complexesmentioning
confidence: 99%
“…Κάτι τέτοιο είναι αναμενόμενο αφού το μόριο έχει άξονα συμμετρίας κάθετο στον αιθυλενικό δεσμό ως προς τον οποίο είναι συμμετρικά τα μεθύλια. Με βάση τα βιβλιογραφικά δεδομένα [184], η κορυφή που βρίσκεται σε χαμηλότερο πεδίο αποδίδεται στα πρωτόνια του ζεύγους των μεθυλίων SCCH 3 που βρίσκονται κοντά στα άτομα θείου ενώ η άλλη στα πρωτόνια του ζεύγους των μεθυλίων NCCH 3 που βρίσκονται κοντά στα ιμινικά άτομα αζώτου. Η απόδοση αυτή στηρίζεται βιβλιογραφικά δεδομένα NMR δύο διαστάσεων NOESY (Nuclear Overhauser and Exchange Spectroscopy) [184].…”
Section: φασματοσκοπία πυρηνικού μαγνητικού συντονισμού πρωτονίου (Ft^h Nmr)unclassified
“…Με βάση τα βιβλιογραφικά δεδομένα [184], η κορυφή που βρίσκεται σε χαμηλότερο πεδίο αποδίδεται στα πρωτόνια του ζεύγους των μεθυλίων SCCH 3 που βρίσκονται κοντά στα άτομα θείου ενώ η άλλη στα πρωτόνια του ζεύγους των μεθυλίων NCCH 3 που βρίσκονται κοντά στα ιμινικά άτομα αζώτου. Η απόδοση αυτή στηρίζεται βιβλιογραφικά δεδομένα NMR δύο διαστάσεων NOESY (Nuclear Overhauser and Exchange Spectroscopy) [184]. Τα φάσματα NOESY απεικονίζουν με την μορφή κορυφών διασταύρωσης (cross peaks) όλες τις αλληλεπιδράσεις πρίοτονίων που είναι γειτονικά στον χώρο.…”
Section: φασματοσκοπία πυρηνικού μαγνητικού συντονισμού πρωτονίου (Ft^h Nmr)unclassified